fix eslint violations in repo editor files

app/assets/javascripts/api.js

@@ -96,7 +96,8 @@ const Api = {
       .done(projects => callback(projects));
   },
 
-  commitMultiple(id, data, callback) {
+  commitMultiple(id, data) {
+    // see https://docs.gitlab.com/ce/api/commits.html#create-a-commit-with-multiple-files-and-actions
     const url = Api.buildUrl(Api.commitPath)
       .replace(':id', id);
     return this.wrapAjaxCall({

app/assets/javascripts/repo/components/repo_commit_section.vue

@@ -43,10 +43,11 @@ export default {
       };
       Store.submitCommitsLoading = true;
       Service.commitFiles(payload)
-      .then(this.resetCommitState);
+        .then(this.resetCommitState)
+        .catch(() => Flash('An error occured while committing your changes'));
     },
 
-    resetCommitState(data) {
+    resetCommitState() {
       this.submitCommitsLoading = false;
       this.changedFiles = [];
       this.commitMessage = '';