Remove Parameter	canMergeFlag : RevFlag in method public writeMergeCommit(author PersonIdent, committer PersonIdent, rw CodeReviewRevWalk, inserter ObjectInserter, canMergeFlag RevFlag, destBranch Branch.NameKey, mergeTip CodeReviewCommit, treeId ObjectId, n CodeReviewCommit) : CodeReviewCommit from class com.google.gerrit.server.git.MergeUtil