DevTools: Remove unused variables. Disallow unused variables with eslint

third_party/WebKit/Source/devtools/front_end/profiler/CPUProfileView.js

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 355 matching lines @@
       maxDepth = Math.max(maxDepth, depth);
     }
     this._cpuProfile.forEachFrame(onOpenFrame, onCloseFrame);
 
     /** @type {!Array<!SDK.CPUProfileNode>} */
     var entryNodes = new Array(entries.length);
     var entryLevels = new Uint16Array(entries.length);
     var entryTotalTimes = new Float32Array(entries.length);
     var entrySelfTimes = new Float32Array(entries.length);
     var entryStartTimes = new Float64Array(entries.length);
-    var minimumBoundary = this.minimumBoundary();
 
     for (var i = 0; i < entries.length; ++i) {
       var entry = entries[i];
       entryNodes[i] = entry.node;
       entryLevels[i] = entry.depth;
       entryTotalTimes[i] = entry.duration;
       entryStartTimes[i] = entry.startTime;
       entrySelfTimes[i] = entry.selfTime;
     }
 
@@ skipping 70 matching lines @@
    * @param {!SDK.CPUProfileNode} node
    */
   constructor(depth, duration, startTime, selfTime, node) {
     this.depth = depth;
     this.duration = duration;
     this.startTime = startTime;
     this.selfTime = selfTime;
     this.node = node;
   }
 };