Remove old iOS porting files.

src/utils/ios/SkStream_NSData.mm

-/*
- * Copyright 2010 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "SkStream_NSData.h"
-
-NSData* NSData_dataWithStream(SkStream* stream) {
-    size_t length = stream->getLength();
-    void* src = malloc(length);
-    size_t bytes = stream->read(src, length);
-    SkASSERT(bytes == length);
-    return [NSData dataWithBytesNoCopy:src length:length freeWhenDone:YES];
-}
-
-NSData* NSData_dataFromResource(const char cname[], const char csuffix[]) {
-    NSBundle* bundle = [NSBundle mainBundle];
-    NSString* name = [NSString stringWithUTF8String:cname];
-    NSString* suffix = [NSString stringWithUTF8String:csuffix];
-    NSString* path = [bundle pathForResource:name ofType:suffix];
-    return [NSData dataWithContentsOfMappedFile:path];
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-SkStream_NSData::SkStream_NSData(NSData* data) {
-    fNSData = data;
-    [fNSData retain];
-
-    this->setMemory([fNSData bytes], [fNSData length], false);
-}
-
-SkStream_NSData::~SkStream_NSData() {
-    [fNSData release];
-}
-
-SkStream_NSData* SkStream_NSData::CreateFromResource(const char name[],
-                                                     const char suffix[]) {
-    NSData* data = NSData_dataFromResource(name, suffix);
-    return SkNEW_ARGS(SkStream_NSData, (data));
-}
-