Fix eslint errors with in-file comments

tests/mocha/block_test.js

@@ -2,9 +2,9 @@
 // Declare some globals to make eslint happier.
 // TODO: make an eslint config that applies to this directory and put this
 // configuration in that file, instead of inline.
-/* global suite, test, chai, setup, teardown */
+/* global suite, test, setup, teardown */
 
-/* global assertFalse, assertTrue, assertNull, assertEquals */
+/* global assertNull, assertEquals */
 
 suite('Blocks', function() {
 

tests/mocha/event_test.js

@@ -5,7 +5,8 @@
 /* global suite, test, setup, teardown */
 /* global sinon */
 
-/* global assertNotNull, assertNotUndefined, assertNull, assertEquals, isEqualArrays, assertUndefined */
+/* global assertNotNull, assertNotUndefined, assertNull, assertEquals,
+   isEqualArrays, assertUndefined */
 suite('Events', function() {
   setup(function() {
     this.workspace = new Blockly.Workspace();

tests/mocha/field_variable_test.js

@@ -3,9 +3,8 @@
 // TODO: make an eslint config that applies to this directory and put this
 // configuration in that file, instead of inline.
 /* global suite, test, chai, setup, teardown */
-/* global sinon */
 
-/* global assertFalse, assertTrue, assertNull, assertEquals, isEqualArrays */
+/* global assertNull, assertEquals, isEqualArrays */
 
 suite('Variable Fields', function() {
   function getMockBlock(workspace) {

tests/mocha/test_helpers.js

@@ -1,5 +1,6 @@
 /* global chai */
-
+/* exported assertEquals, assertTrue, assertFalse, assertNull, assertNotNull,
+   isEqualArrays, assertUndefined, assertNotUndefined */
 function _argumentsIncludeComments(expectedNumberOfNonCommentArgs, args) {
   return args.length == expectedNumberOfNonCommentArgs + 1;
 }