Removing unnecessary NSPort instance, which was attached to NSRunLoop…

… to prevent it from immediately exiting

AFNetworking/AFHTTPRequestOperation.h

@@ -28,7 +28,6 @@ extern NSString * const AFHTTPOperationDidFinishNotification;
 @interface AFHTTPRequestOperation : NSOperation {
 @private    
     NSURLConnection *_connection;
-    NSPort *_port;
     NSSet *_runLoopModes;
 
     NSURLRequest *_request;

AFNetworking/AFHTTPRequestOperation.m

@@ -78,7 +78,6 @@ static inline BOOL AFHTTPOperationStateTransitionIsValid(AFHTTPOperationState fr
 @interface AFHTTPRequestOperation ()
 @property (nonatomic, assign) AFHTTPOperationState state;
 @property (nonatomic, assign) BOOL isCancelled;
-@property (readwrite, nonatomic, retain) NSPort *port;
 @property (readwrite, nonatomic, retain) NSMutableData *dataAccumulator;
 @property (readwrite, nonatomic, copy) AFHTTPRequestOperationCompletionBlock completion;
 
@@ -90,7 +89,6 @@ @implementation AFHTTPRequestOperation
 @synthesize isCancelled = _isCancelled;
 @synthesize connection = _connection;
 @synthesize runLoopModes = _runLoopModes;
-@synthesize port = _port;
 @synthesize request = _request;
 @synthesize response = _response;
 @synthesize error = _error;
@@ -124,7 +122,6 @@ - (id)initWithRequest:(NSURLRequest *)urlRequest {
 
 - (void)dealloc {
     [_runLoopModes release];
-    [_port release];
 
     [_request release];
     [_response release];
@@ -139,7 +136,6 @@ - (void)dealloc {
 
 - (void)cleanup {
     for (NSString *runLoopMode in self.runLoopModes) {
-        [[NSRunLoop currentRunLoop] removePort:self.port forMode:runLoopMode];
         [self.connection unscheduleFromRunLoop:[NSRunLoop currentRunLoop] forMode:runLoopMode];
     }
     CFRunLoopStop([[NSRunLoop currentRunLoop] getCFRunLoop]); 
@@ -204,12 +200,10 @@ - (void)start {
     self.state = AFHTTPOperationExecutingState;
 
     self.connection = [[[NSURLConnection alloc] initWithRequest:self.request delegate:self startImmediately:NO] autorelease];
-    self.port = [NSPort port];
 
     NSRunLoop *runLoop = [NSRunLoop currentRunLoop];
     for (NSString *runLoopMode in self.runLoopModes) {
         [self.connection scheduleInRunLoop:runLoop forMode:runLoopMode];
-        [runLoop addPort:self.port forMode:runLoopMode];
     }
 
     [self.connection start];