Try removing docker from dockerfiles
diff --git a/buildkite/docker/debian10/Dockerfile b/buildkite/docker/debian10/Dockerfile
index 2429693..37371c3 100644
--- a/buildkite/docker/debian10/Dockerfile
+++ b/buildkite/docker/debian10/Dockerfile
@@ -72,14 +72,6 @@
     apt-get update -y && apt-get install google-cloud-sdk -y && \
     rm -rf /var/lib/apt/lists/*
 
-### Docker (for legacy rbe_autoconfig)
-RUN apt-get -y update && \
-    apt-get -y install apt-transport-https ca-certificates && \
-    curl -sSL https://download.docker.com/linux/debian/gpg | apt-key add - && \
-    add-apt-repository "deb [arch=$BUILDARCH] https://download.docker.com/linux/debian $(lsb_release -cs) stable" && \
-    apt-get -y update && \
-    apt-get -y install docker-ce && \
-    rm -rf /var/lib/apt/lists/*
 
 # Bazelisk
 RUN LATEST_BAZELISK=$(curl -sSI https://github.com/bazelbuild/bazelisk/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
diff --git a/buildkite/docker/debian11/Dockerfile b/buildkite/docker/debian11/Dockerfile
index d7ca602..4bcb094 100644
--- a/buildkite/docker/debian11/Dockerfile
+++ b/buildkite/docker/debian11/Dockerfile
@@ -66,14 +66,6 @@
     apt-get update -y && apt-get install google-cloud-sdk -y && \
     rm -rf /var/lib/apt/lists/*
 
-### Docker (for legacy rbe_autoconfig)
-RUN apt-get -y update && \
-    apt-get -y install apt-transport-https ca-certificates && \
-    curl -sSL https://download.docker.com/linux/debian/gpg | apt-key add - && \
-    add-apt-repository "deb [arch=$BUILDARCH] https://download.docker.com/linux/debian $(lsb_release -cs) stable" && \
-    apt-get -y update && \
-    apt-get -y install docker-ce && \
-    rm -rf /var/lib/apt/lists/*
 
 # Bazelisk
 RUN LATEST_BAZELISK=$(curl -sSI https://github.com/bazelbuild/bazelisk/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
diff --git a/buildkite/docker/debian12/Dockerfile b/buildkite/docker/debian12/Dockerfile
index f38bcb8..183b778 100644
--- a/buildkite/docker/debian12/Dockerfile
+++ b/buildkite/docker/debian12/Dockerfile
@@ -61,14 +61,6 @@
     apt-get update -y && apt-get install google-cloud-sdk -y && \
     rm -rf /var/lib/apt/lists/*
 
-### Docker (for legacy rbe_autoconfig)
-RUN apt-get -y update && \
-    apt-get -y install apt-transport-https ca-certificates && \
-    curl -sSL https://download.docker.com/linux/debian/gpg | apt-key add - && \
-    add-apt-repository "deb [arch=$TARGETARCH] https://download.docker.com/linux/debian $(lsb_release -cs) stable" && \
-    apt-get -y update && \
-    apt-get -y install docker-ce && \
-    rm -rf /var/lib/apt/lists/*
 
 # Bazelisk
 RUN LATEST_BAZELISK=$(curl -sSI https://github.com/bazelbuild/bazelisk/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
diff --git a/buildkite/docker/debian13/Dockerfile b/buildkite/docker/debian13/Dockerfile
index ddaadf0..5f4c316 100644
--- a/buildkite/docker/debian13/Dockerfile
+++ b/buildkite/docker/debian13/Dockerfile
@@ -61,14 +61,6 @@
     apt-get update -y && apt-get install google-cloud-sdk -y && \
     rm -rf /var/lib/apt/lists/*
 
-### Docker (for legacy rbe_autoconfig)
-RUN apt-get -y update && \
-    apt-get -y install apt-transport-https ca-certificates && \
-    curl -fsSL https://download.docker.com/linux/debian/gpg | gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg && \
-    echo "deb [arch=$TARGETARCH signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/debian $(lsb_release -cs) stable" | tee /etc/apt/sources.list.d/docker.list > /dev/null && \
-    apt-get -y update && \
-    apt-get -y install docker-ce && \
-    rm -rf /var/lib/apt/lists/*
 
 # Bazelisk
 RUN LATEST_BAZELISK=$(curl -sSI https://github.com/bazelbuild/bazelisk/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
diff --git a/buildkite/docker/rockylinux8/Dockerfile b/buildkite/docker/rockylinux8/Dockerfile
index 556e3f5..32b0a40 100644
--- a/buildkite/docker/rockylinux8/Dockerfile
+++ b/buildkite/docker/rockylinux8/Dockerfile
@@ -41,10 +41,6 @@
 # Allow using sudo inside the container.
 RUN echo "ALL ALL=(ALL:ALL) NOPASSWD: ALL" >> /etc/sudoers
 
-RUN dnf -y install dnf-utils && \
-    dnf config-manager --add-repo https://download.docker.com/linux/rhel/docker-ce.repo && \
-    dnf -y install docker-ce docker-ce-cli containerd.io && \
-    dnf clean all
 
 # Ensure that Bazel can use its beloved ISO-8859-1 locale.
 RUN localedef -i en_US -f ISO-8859-1 en_US.ISO-8859-1
diff --git a/buildkite/docker/ubuntu1604/Dockerfile b/buildkite/docker/ubuntu1604/Dockerfile
index db54909..d3cb3e9 100644
--- a/buildkite/docker/ubuntu1604/Dockerfile
+++ b/buildkite/docker/ubuntu1604/Dockerfile
@@ -85,14 +85,6 @@
     apt-get update -y && apt-get install google-cloud-sdk -y && \
     rm -rf /var/lib/apt/lists/*
 
-### Docker (for legacy rbe_autoconfig)
-RUN apt-get -y update && \
-    apt-get -y install apt-transport-https ca-certificates && \
-    curl -sSL https://download.docker.com/linux/ubuntu/gpg | apt-key add - && \
-    add-apt-repository "deb [arch=$BUILDARCH] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" && \
-    apt-get -y update && \
-    apt-get -y install docker-ce && \
-    rm -rf /var/lib/apt/lists/*
 
 # Bazelisk
 RUN LATEST_BAZELISK=$(curl -sSI https://github.com/bazelbuild/bazelisk/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
diff --git a/buildkite/docker/ubuntu1804/Dockerfile b/buildkite/docker/ubuntu1804/Dockerfile
index 922b75f..dc125a5 100644
--- a/buildkite/docker/ubuntu1804/Dockerfile
+++ b/buildkite/docker/ubuntu1804/Dockerfile
@@ -67,14 +67,6 @@
     apt-get update -y && apt-get install google-cloud-sdk -y && \
     rm -rf /var/lib/apt/lists/*
 
-### Docker (for legacy rbe_autoconfig)
-RUN apt-get -y update && \
-    apt-get -y install apt-transport-https ca-certificates && \
-    curl -sSL https://download.docker.com/linux/ubuntu/gpg | apt-key add - && \
-    add-apt-repository "deb [arch=$BUILDARCH] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" && \
-    apt-get -y update && \
-    apt-get -y install docker-ce && \
-    rm -rf /var/lib/apt/lists/*
 
 # Bazelisk
 RUN LATEST_BAZELISK=$(curl -sSI https://github.com/bazelbuild/bazelisk/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
diff --git a/buildkite/docker/ubuntu2004/Dockerfile b/buildkite/docker/ubuntu2004/Dockerfile
index 142ea1a..880ac65 100644
--- a/buildkite/docker/ubuntu2004/Dockerfile
+++ b/buildkite/docker/ubuntu2004/Dockerfile
@@ -81,14 +81,6 @@
     apt-get update -y && apt-get install google-cloud-sdk=466.0.0-0 -y && \
     rm -rf /var/lib/apt/lists/*
 
-### Docker (for legacy rbe_autoconfig)
-RUN apt-get -y update && \
-    apt-get -y install apt-transport-https ca-certificates && \
-    curl -fsSL https://download.docker.com/linux/ubuntu/gpg | apt-key add - && \
-    add-apt-repository "deb [arch=$TARGETARCH] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" && \
-    apt-get -y update && \
-    apt-get -y install docker-ce && \
-    rm -rf /var/lib/apt/lists/*
 
 # Bazelisk
 RUN LATEST_BAZELISK=$(curl -sSI https://github.com/bazelbuild/bazelisk/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
diff --git a/buildkite/docker/ubuntu2404/Dockerfile b/buildkite/docker/ubuntu2404/Dockerfile
index d00d0f3..77c87cf 100644
--- a/buildkite/docker/ubuntu2404/Dockerfile
+++ b/buildkite/docker/ubuntu2404/Dockerfile
@@ -16,7 +16,6 @@
     clang-tools \
     coreutils \
     curl \
-    docker.io \
     dnsutils \
     ed \
     expect \