remove duplication of java-common-protos

Author: chingor13

generation/check_non_release_please_versions.sh

@@ -15,7 +15,6 @@ for pomFile in $(find . -mindepth 2 -name pom.xml | sort ); do
       [[ "${pomFile}" =~ .*sdk-platform-java.* ]] || \
       [[ "${pomFile}" =~ .*java-common-protos.* ]] || \
       [[ "${pomFile}" =~ .*java-showcase.* ]] || \
-      [[ "${pomFile}" =~ .*java-common-protos.* ]] || \
       [[ "${pomFile}" =~ .*java-iam.* ]] || \
       [[ "${pomFile}" =~ .*java-spanner.* ]] || \
       [[ "${pomFile}" =~ .*java-spanner-jdbc.* ]] || \