resolve all no-dupe-keys eslint violations

app/assets/javascripts/compare_autocomplete.js.es6

-/* eslint-disable func-names, space-before-function-paren, one-var, no-var, one-var-declaration-per-line, object-shorthand, comma-dangle, prefer-arrow-callback, no-else-return, newline-per-chained-call, no-dupe-keys, wrap-iife, max-len */
+/* eslint-disable func-names, space-before-function-paren, one-var, no-var, one-var-declaration-per-line, object-shorthand, comma-dangle, prefer-arrow-callback, no-else-return, newline-per-chained-call, wrap-iife, max-len */
 
 (function() {
   this.CompareAutocomplete = (function() {
@@ -28,7 +28,6 @@
           selectable: true,
           filterable: true,
           filterByText: true,
-          toggleLabel: true,
           fieldName: $dropdown.data('field-name'),
           filterInput: 'input[type="search"]',
           renderRow: function(ref) {

app/assets/javascripts/merge_conflicts/merge_conflict_store.js.es6

-/* eslint-disable comma-dangle, object-shorthand, no-dupe-keys, no-param-reassign, camelcase, prefer-const, no-nested-ternary, no-continue, max-len */
+/* eslint-disable comma-dangle, object-shorthand, no-param-reassign, camelcase, prefer-const, no-nested-ternary, no-continue, max-len */
 /* global Cookies */
 /* global Vue */
 
@@ -40,7 +40,6 @@
         commitMessage: data.commit_message,
         sourceBranch: data.source_branch,
         targetBranch: data.target_branch,
-        commitMessage: data.commit_message,
         shortCommitSha: data.commit_sha.slice(0, 7),
       };
     },