Build scala-provider plugin on stable-2.14 and stable-2.15

Change-Id: I44b0da1fafe76ef57fc30f0a86262d7ea27f93be
diff --git a/jenkins/gerrit-buck-bazel-plugin-scala-provider.yaml b/jenkins/gerrit-buck-bazel-plugin-scala-provider.yaml
index 5402e0f..d4f77ba 100644
--- a/jenkins/gerrit-buck-bazel-plugin-scala-provider.yaml
+++ b/jenkins/gerrit-buck-bazel-plugin-scala-provider.yaml
@@ -6,10 +6,8 @@
             - stable-2.13
             - stable-2.12
             - stable-2.11
-      - 'plugin-scripting-{name}-bazel-{branch}-{gerrit-branch}':
+      - 'plugin-scripting-{name}-bazel-{branch}':
           branch:
             - master
-          gerrit-branch:
-            - master
             - stable-2.15
             - stable-2.14