Ignoring -Wunused-parameter for AFContentTypeForPathExtension

AFNetworking/AFURLRequestSerialization.m

@@ -421,6 +421,8 @@ static inline NSString * AFMultipartFormFinalBoundary() {
     return [NSString stringWithFormat:@"%@--%@--%@", kAFMultipartFormCRLF, kAFMultipartFormBoundary, kAFMultipartFormCRLF];
 }
 
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wunused-parameter"
 static inline NSString * AFContentTypeForPathExtension(NSString *extension) {
 #ifdef __UTTYPE__
     NSString *UTI = (__bridge_transfer NSString *)UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, (__bridge CFStringRef)extension, NULL);
@@ -434,6 +436,7 @@ static inline NSString * AFContentTypeForPathExtension(NSString *extension) {
     return @"application/octet-stream";
 #endif
 }
+#pragma clang diagnostic pop
 
 NSUInteger const kAFUploadStream3GSuggestedPacketSize = 1024 * 16;
 NSTimeInterval const kAFUploadStream3GSuggestedDelay = 0.2;