Remove error prone toolchain activation

This toolchain is already enabled in gerrit tree in .bazelrc per default
so that we don't need to activate it explicitly in the CI anymore.

Change-Id: I5304079540fb8fcd4a46b85c297fe963a0e8268a
diff --git a/jenkins/gerrit-bazel-build.sh b/jenkins/gerrit-bazel-build.sh
index 380561c..2cbdf54 100644
--- a/jenkins/gerrit-bazel-build.sh
+++ b/jenkins/gerrit-bazel-build.sh
@@ -3,7 +3,7 @@
 cd gerrit
 . set-java.sh 8
 
-export BAZEL_OPTS="--spawn_strategy=standalone --genrule_strategy=standalone --java_toolchain //tools:error_prone_warnings_toolchain"
+export BAZEL_OPTS="--spawn_strategy=standalone --genrule_strategy=standalone"
 
 bazelisk version
 bazelisk build $BAZEL_OPTS plugins:core release api