Removed fdlibm.js, as it is now an empty shell.

BUG=

Review-Url: https://codereview.chromium.org/2106413002
Cr-Commit-Position: refs/heads/master@{#37510}

src/third_party/fdlibm/LICENSE

-Copyright (C) 1993-2004 by Sun Microsystems, Inc. All rights reserved.
-
-Developed at SunSoft, a Sun Microsystems, Inc. business.
-Permission to use, copy, modify, and distribute this
-software is freely granted, provided that this notice
-is preserved.

src/third_party/fdlibm/README.v8

-Name: Freely Distributable LIBM 
-Short Name: fdlibm
-URL: http://www.netlib.org/fdlibm/
-Version: 5.3 
-License: Freely Distributable.
-License File: LICENSE.
-Security Critical: yes.
-License Android Compatible: yes.
-
-Description:
-This is used to provide a accurate implementation for trigonometric functions
-used in V8.
-
-Local Modifications:
-For the use in V8, fdlibm has been reduced to include only sine, cosine and
-tangent.  To make inlining into generated code possible, a large portion of
-that has been translated to Javascript.  The rest remains in C, but has been
-refactored and reformatted to interoperate with the rest of V8.

src/third_party/fdlibm/fdlibm.js

-// The following is adapted from fdlibm (http://www.netlib.org/fdlibm),
-//
-// ====================================================
-// Copyright (C) 1993-2004 by Sun Microsystems, Inc. All rights reserved.
-//
-// Developed at SunSoft, a Sun Microsystems, Inc. business.
-// Permission to use, copy, modify, and distribute this
-// software is freely granted, provided that this notice
-// is preserved.
-// ====================================================
-//
-// The original source code covered by the above license above has been
-// modified significantly by Google Inc.
-// Copyright 2014 the V8 project authors. All rights reserved.
-//
-// The following is a straightforward translation of fdlibm routines
-// by Raymond Toy (rtoy@google.com).
-
-(function(global, utils) {
-  
-"use strict";
-
-%CheckIsBootstrapping();
-
-// -------------------------------------------------------------------
-// Imports
-
-var GlobalMath = global.Math;
-
-utils.Import(function(from) {});
-
-//-------------------------------------------------------------------
-
-utils.InstallFunctions(GlobalMath, DONT_ENUM, []);
-
-})