Remove USE_BAZEL_VERSION from .bazelci/postsubmit.yml and .bazelci/presubmit.yml

Bazel 7.2.0 has been released and the fix for https://github.com/bazelbuild/bazel/issues/21604 is included.

PiperOrigin-RevId: 644998185
Change-Id: Idbb39dd858dfde20d960899d7d69d56562ff80d5
diff --git a/.bazelci/postsubmit.yml b/.bazelci/postsubmit.yml
index 162e6cf..44f84e0 100644
--- a/.bazelci/postsubmit.yml
+++ b/.bazelci/postsubmit.yml
@@ -318,10 +318,6 @@
   rbe_ubuntu2004:
     platform: ubuntu2004
     name: "RBE"
-    environment:
-      # Use last_green to pickup the fix for https://github.com/bazelbuild/bazel/issues/21604.
-      # TODO(chiwang): Remove this after Bazel 7.2.0 is released.
-      USE_BAZEL_VERSION: last_green
     shell_commands:
       - sed -i.bak
         -e 's/^# android_sdk_repository/android_sdk_repository/'
diff --git a/.bazelci/presubmit.yml b/.bazelci/presubmit.yml
index fcd1fc0..8d1af11 100644
--- a/.bazelci/presubmit.yml
+++ b/.bazelci/presubmit.yml
@@ -378,10 +378,6 @@
   rbe_ubuntu2004:
     platform: ubuntu2004
     name: "RBE"
-    environment:
-      # Use last_green to pickup the fix for https://github.com/bazelbuild/bazel/issues/21604.
-      # TODO(chiwang): Remove this after Bazel 7.2.0 is released.
-      USE_BAZEL_VERSION: last_green
     shell_commands:
       - sed -i.bak
         -e 's/^# android_sdk_repository/android_sdk_repository/'