Remove unused .h files in modules/crypto.

third_party/WebKit/Source/modules/crypto/BUILD.gn

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//third_party/WebKit/Source/modules/modules.gni")
 
 blink_modules_sources("crypto") {
   sources = [
-    "AesKeyAlgorithm.h",
     "Crypto.cpp",
     "Crypto.h",
     "CryptoHistograms.cpp",
     "CryptoHistograms.h",
     "CryptoKey.cpp",
     "CryptoKey.h",
     "CryptoResultImpl.cpp",
     "CryptoResultImpl.h",
     "DOMWindowCrypto.cpp",
     "DOMWindowCrypto.h",
     "NormalizeAlgorithm.cpp",
     "NormalizeAlgorithm.h",
     "SubtleCrypto.cpp",
     "SubtleCrypto.h",
     "WorkerGlobalScopeCrypto.cpp",
     "WorkerGlobalScopeCrypto.h",
   ]
 }