Remove clearTimeout use.

lodash.js

@@ -249,7 +249,7 @@
     'Function', 'Int8Array', 'Int16Array', 'Int32Array', 'Map', 'Math', 'Object',
     'Promise', 'Reflect', 'RegExp', 'Set', 'String', 'Symbol', 'TypeError',
     'Uint8Array', 'Uint8ClampedArray', 'Uint16Array', 'Uint32Array', 'WeakMap',
-    '_', 'clearTimeout', 'isFinite', 'parseInt', 'setTimeout'
+    '_', 'isFinite', 'parseInt', 'setTimeout'
   ];
 
   /** Used to make template sourceURLs easier to identify. */
@@ -1296,8 +1296,7 @@
         splice = arrayProto.splice;
 
     /** Built-in method references that are mockable. */
-    var clearTimeout = function(id) { return context.clearTimeout.call(root, id); },
-        setTimeout = function(func, wait) { return context.setTimeout.call(root, func, wait); };
+    var setTimeout = function(func, wait) { return context.setTimeout.call(root, func, wait); };
 
     /* Built-in method references for those with the same name as other `lodash` methods. */
     var nativeCeil = Math.ceil,
@@ -9679,7 +9678,6 @@
       }
 
       function trailingEdge(time) {
-        clearTimeout(timerId);
         timerId = undefined;
 
         // Only invoke if we have `lastArgs` which means `func` has been
@@ -9692,9 +9690,6 @@
       }
 
       function cancel() {
-        if (timerId !== undefined) {
-          clearTimeout(timerId);
-        }
         lastInvokeTime = 0;
         lastArgs = lastCallTime = lastThis = timerId = undefined;
       }
@@ -9717,7 +9712,6 @@
           }
           if (maxing) {
             // Handle invocations in a tight loop.
-            clearTimeout(timerId);
             timerId = setTimeout(timerExpired, wait);
             return invokeFunc(lastCallTime);
           }