Remove all of WebCore/platform/mac which is not mentioned in WebCore.gypi.

Source/WebCore/platform/mac/WebNSAttributedStringExtras.mm

-/*
- * Copyright (C) 2005, 2007, 2008, 2011 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
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
- * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
- * THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#import "config.h"
-#import "WebNSAttributedStringExtras.h"
-
-#if PLATFORM(IOS)
-enum {
-    NSAttachmentCharacter = 0xfffc    /* To denote attachments. */
-};
-#endif
-
-namespace WebCore {
-
-NSAttributedString *attributedStringByStrippingAttachmentCharacters(NSAttributedString *attributedString)
-{
-    NSRange attachmentRange;
-    NSString *originalString = [attributedString string];
-    static NSString *attachmentCharString = nil;
-    
-    if (!attachmentCharString) {
-        unichar chars[2];
-        if (!attachmentCharString) {
-            chars[0] = NSAttachmentCharacter;
-            chars[1] = 0;
-            attachmentCharString = [[NSString alloc] initWithCharacters:chars length:1];
-        }
-    }
-    
-    attachmentRange = [originalString rangeOfString:attachmentCharString];
-    if (attachmentRange.location != NSNotFound && attachmentRange.length > 0) {
-        NSMutableAttributedString *newAttributedString = [[attributedString mutableCopyWithZone:NULL] autorelease];
-        
-        while (attachmentRange.location != NSNotFound && attachmentRange.length > 0) {
-            [newAttributedString replaceCharactersInRange:attachmentRange withString:@""];
-            attachmentRange = [[newAttributedString string] rangeOfString:attachmentCharString];
-        }
-        return newAttributedString;
-    }
-    
-    return attributedString;
-}
-
-}