title: How can I remove "User Defined Runtime Attributes" in Xcode and what are they?
body: <p>In Xcode 5.0.2 I've created a new Master-Detail Application - and it worked well on iPhone and iPad simulators.</p>
  
  <p>But then accidentally in <strong>User Defined Runtime Attribites</strong> in the right panel of Xcode I've clicked (three times) a plus and added "keyPath" entries (without really understanding what they are):</p>
  
  <p><img src="https://i.stack.imgur.com/L4JcC.png" alt="enter image description here"></p>
  
  <p>How can I remove them please? Clicking a minus doesn't change anything and running in simulator now fails with:</p>
  
  <pre><code>2013-11-24 21:02:53.003 MDExample[23132:a0b] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[&lt;UITableView 0xab26000&gt; setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key keyPath.'
  *** First throw call stack:
  (
      0   CoreFoundation                      0x0173c5e4 __exceptionPreprocess + 180
      1   libobjc.A.dylib                     0x014bf8b6 objc_exception_throw + 44
      2   CoreFoundation                      0x017cc6a1 -[NSException raise] + 17
      3   Foundation                          0x011809ee -[NSObject(NSKeyValueCoding) setValue:forUndefinedKey:] + 282
      4   Foundation                          0x010eccfb _NSSetUsingKeyValueSetter + 88
      5   Foundation                          0x010ec253 -[NSObject(NSKeyValueCoding) setValue:forKey:] + 267
      6   UIKit                               0x00297e0b -[UIView(CALayerDelegate) setValue:forKey:] + 168
      7   Foundation                          0x0114e70a -[NSObject(NSKeyValueCoding) setValue:forKeyPath:] + 412
      8   UIKit                               0x007aa0c5 -[UINibKeyValuePair apply] + 70
      9   libobjc.A.dylib                     0x014d17d2 -[NSObject performSelector:] + 62
      10  CoreFoundation                      0x01737b6a -[NSArray makeObjectsPerformSelector:] + 314
      11  UIKit                               0x004ce552 -[UINib instantiateWithOwner:options:] + 1389
      12  UIKit                               0x00340605 -[UIViewController _loadViewFromNibNamed:bundle:] + 280
      13  UIKit                               0x00340dad -[UIViewController loadView] + 302
      14  UIKit                               0x004e911e -[UITableViewController loadView] + 80
      15  UIKit                               0x003410ae -[UIViewController loadViewIfRequired] + 78
      16  UIKit                               0x003415b4 -[UIViewController view] + 35
      17  UIKit                               0x0036bca9 -[UINavigationController rotatingSnapshotViewForWindow:] + 52
      18  UIKit                               0x00695a60 -[UIClientRotationContext initWithClient:toOrientation:duration:andWindow:] + 420
      19  UIKit                               0x002712f2 -[UIWindow _setRotatableClient:toOrientation:updateStatusBar:duration:force:isRotating:] + 1495
      20  UIKit                               0x00270d16 -[UIWindow _setRotatableClient:toOrientation:updateStatusBar:duration:force:] + 82
      21  UIKit                               0x00270be8 -[UIWindow _setRotatableViewOrientation:updateStatusBar:duration:force:] + 117
      22  UIKit                               0x00270c70 -[UIWindow _setRotatableViewOrientation:duration:force:] + 67
      23  UIKit                               0x0026fd0a __57-[UIWindow _updateToInterfaceOrientation:duration:force:]_block_invoke + 120
      24  UIKit                               0x0026fc6c -[UIWindow _updateToInterfaceOrientation:duration:force:] + 400
      25  UIKit                               0x002709c3 -[UIWindow setAutorotates:forceUpdateInterfaceOrientation:] + 870
      26  UIKit                               0x00273fb6 -[UIWindow setDelegate:] + 449
      27  UIKit                               0x00345737 -[UIViewController _tryBecomeRootViewControllerInWindow:] + 180
      28  UIKit                               0x00269c1c -[UIWindow addRootViewControllerViewIfPossible] + 609
      29  UIKit                               0x00269d97 -[UIWindow _setHidden:forced:] + 312
      30  UIKit                               0x0026a02d -[UIWindow _orderFrontWithoutMakingKey] + 49
      31  UIKit                               0x0027489a -[UIWindow makeKeyAndVisible] + 65
      32  UIKit                               0x00227cd0 -[UIApplication _callInitializationDelegatesForURL:payload:suspended:] + 1851
      33  UIKit                               0x0022c3a8 -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 824
      34  UIKit                               0x0024087c -[UIApplication handleEvent:withNewEvent:] + 3447
      35  UIKit                               0x00240de9 -[UIApplication sendEvent:] + 85
      36  UIKit                               0x0022e025 _UIApplicationHandleEvent + 736
      37  GraphicsServices                    0x036932f6 _PurpleEventCallback + 776
      38  GraphicsServices                    0x03692e01 PurpleEventCallback + 46
      39  CoreFoundation                      0x016b7d65 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 53
      40  CoreFoundation                      0x016b7a9b __CFRunLoopDoSource1 + 523
      41  CoreFoundation                      0x016e277c __CFRunLoopRun + 2156
      42  CoreFoundation                      0x016e1ac3 CFRunLoopRunSpecific + 467
      43  CoreFoundation                      0x016e18db CFRunLoopRunInMode + 123
      44  UIKit                               0x0022badd -[UIApplication _run] + 840
      45  UIKit                               0x0022dd3b UIApplicationMain + 1225
      46  MDExample                           0x00003b3d main + 141
      47  libdyld.dylib                       0x01d78725 start + 0
  )
  libc++abi.dylib: terminating with uncaught exception of type NSException
  (lldb) 
  </code></pre>