Remove Docker agents as they're no longer used.

Change-Id: I8a565354c5dbd91e5d18e28f6951cf9898e1659a
diff --git a/gce/ubuntu-16-04-docker.sh b/gce/ubuntu-16-04-docker.sh
deleted file mode 100644
index ab7dd9c..0000000
--- a/gce/ubuntu-16-04-docker.sh
+++ /dev/null
@@ -1,75 +0,0 @@
-apt-get -y install apt-transport-https ca-certificates
-
-# From https://download.docker.com/linux/ubuntu/gpg
-cat <<'EOF' | apt-key add -
------BEGIN PGP PUBLIC KEY BLOCK-----
-
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-/nQNfsA6uu+9H7NhbehBMhYnpNZyrHzCmzyXkauwRAqoCbGCNykTRwsur9gS41TQ
-M8ssD1jFheOJf3hODnkKU+HKjvMROl1DK7zdmLdNzA1cvtZH/nCC9KPj1z8QC47S
-xx+dTZSx4ONAhwbS/LN3PoKtn8LPjY9NP9uDWI+TWYquS2U+KHDrBDlsgozDbs/O
-jCxcpDzNmXpWQHEtHU7649OXHP7UeNST1mCUCH5qdank0V1iejF6/CfTFU4MfcrG
-YT90qFF93M3v01BbxP+EIY2/9tiIPbrd
-=0YYh
------END PGP PUBLIC KEY BLOCK-----
-EOF
-
-add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
-
-apt-get -y update
-apt-get -y install docker-ce
-
-# Docker group
-usermod -aG docker ci
diff --git a/gce/vm.sh b/gce/vm.sh
index 5632f55..6f5cbaa 100755
--- a/gce/vm.sh
+++ b/gce/vm.sh
@@ -43,8 +43,6 @@
     "ubuntu-16-04-slave-2 ubuntu-1604-lts ubuntu_16.04-x86_64-2 europe-west1-d default startup-script=jenkins-slave.sh ubuntu-16-04-slave.sh bootstrap-bazel.sh linux-android.sh cleanup-install.sh"
     "ubuntu-16-04-slave-3 ubuntu-1604-lts ubuntu_16.04-x86_64-3 europe-west1-d default startup-script=jenkins-slave.sh ubuntu-16-04-slave.sh bootstrap-bazel.sh linux-android.sh cleanup-install.sh"
     "ubuntu-16-04-slave-4 ubuntu-1604-lts ubuntu_16.04-x86_64-4 europe-west1-d default startup-script=jenkins-slave.sh ubuntu-16-04-slave.sh bootstrap-bazel.sh linux-android.sh cleanup-install.sh"
-    "ubuntu-docker-slave-1 ubuntu-1604-lts ubuntu_16.04-x86_64-docker-1 europe-west1-d default startup-script=jenkins-slave.sh ubuntu-16-04-slave.sh ubuntu-16-04-docker.sh bootstrap-bazel.sh linux-android.sh cleanup-install.sh"
-    "ubuntu-docker-slave-2 ubuntu-1604-lts ubuntu_16.04-x86_64-docker-2 europe-west1-d default startup-script=jenkins-slave.sh ubuntu-16-04-slave.sh ubuntu-16-04-docker.sh bootstrap-bazel.sh linux-android.sh cleanup-install.sh"
     "freebsd-11-slave-1 https://www.googleapis.com/compute/v1/projects/freebsd-org-cloud-dev/global/images/freebsd-11-1-stable-amd64-2017-12-28 freebsd-11-1 europe-west1-d default startup-script=jenkins-slave.sh freebsd-slave.sh freebsd-ci-homedir.sh"
     "freebsd-11-slave-2 https://www.googleapis.com/compute/v1/projects/freebsd-org-cloud-dev/global/images/freebsd-11-1-stable-amd64-2017-12-28 freebsd-11-2 europe-west1-d default startup-script=jenkins-slave.sh freebsd-slave.sh freebsd-ci-homedir.sh"
     "freebsd-12-slave-1 https://www.googleapis.com/compute/v1/projects/freebsd-org-cloud-dev/global/images/freebsd-12-0-current-amd64-2017-12-28 freebsd-12-1 europe-west1-d default startup-script=jenkins-slave.sh freebsd-slave.sh freebsd-ci-homedir.sh"
diff --git a/jenkins/BUILD b/jenkins/BUILD
index 0223234..2a01e1c 100644
--- a/jenkins/BUILD
+++ b/jenkins/BUILD
@@ -35,9 +35,6 @@
 UBUNTU_1604_PREFIX = "ubuntu_16.04-x86_64"
 UBUNTU_1604_COUNT = 4
 
-UBUNTU_DOCKER_PREFIX = "ubuntu_16.04-x86_64-docker"
-UBUNTU_DOCKER_COUNT = 2
-
 WINDOWS_PREFIX = "windows-x86_64"
 WINDOWS_COUNT = 2
 
@@ -64,13 +61,6 @@
     tunnel = "jenkins.c.bazel-public.internal:50000",
 )
 
-jenkins_nodes(
-    UBUNTU_DOCKER_PREFIX,
-    UBUNTU_DOCKER_COUNT,
-    labels = ["docker"],
-    tunnel = "jenkins.c.bazel-public.internal:50000",
-)
-
 # Non-release nodes
 jenkins_nodes(
     UBUNTU_1604_PREFIX,
@@ -227,7 +217,6 @@
               ] + jenkins_node_names(DARWIN_PREFIX, DARWIN_COUNT) +
               jenkins_node_names(FREEBSD_11_PREFIX, FREEBSD_11_COUNT) +
               jenkins_node_names(WINDOWS_PREFIX, WINDOWS_COUNT) +
-              jenkins_node_names(UBUNTU_DOCKER_PREFIX, UBUNTU_DOCKER_COUNT) +
               jenkins_node_names(UBUNTU_1404_PREFIX, UBUNTU_1404_COUNT) +
               jenkins_node_names(UBUNTU_1604_PREFIX, UBUNTU_1604_COUNT),
     jobs = [
diff --git a/jenkins/jobs/configs/continuous-integration.json b/jenkins/jobs/configs/continuous-integration.json
index 17d4d21..b60446b 100644
--- a/jenkins/jobs/configs/continuous-integration.json
+++ b/jenkins/jobs/configs/continuous-integration.json
@@ -1,5 +1,5 @@
 [
     {
-        "node": "docker",
+        "node": "linux-x86_64",
     }
 ]
diff --git a/jenkins/lib/src/build/bazel/ci/JenkinsUtils.groovy b/jenkins/lib/src/build/bazel/ci/JenkinsUtils.groovy
index c7eb502..60d0991 100644
--- a/jenkins/lib/src/build/bazel/ci/JenkinsUtils.groovy
+++ b/jenkins/lib/src/build/bazel/ci/JenkinsUtils.groovy
@@ -30,7 +30,6 @@
   /** A list of regex aliases to know that ubuntu is linux */
   private static def NODE_ALIASES = [
     "ubuntu.*": "linux-x86_64",
-    "docker.*": "linux-x86_64",
     "darwin.*": "darwin-x86_64",
   ]