Remove NSString category per discussion with @fredkiefer

Source/GSBindingHelpers.h

@@ -86,8 +86,4 @@
 }
 @end
 
-@interface NSString (PrivatePathExtension)
-- (NSString *) stringByRemovingFirstKeyPath;
-@end
-
 #endif //_GS_BINDING_HELPER_H

Source/NSKeyValueBinding.m

@@ -122,40 +122,6 @@
 
 @end
 
-@implementation NSString (PrivatePathExtension)
-
-- (NSString *) stringByRemovingFirstKeyPath
-{
-  NSArray *components = [self componentsSeparatedByString: @"."];
-  NSString *result = @"";
-  NSEnumerator *en = [components objectEnumerator];
-  NSString *component = nil;
-  NSUInteger i = 0;
-
-  if ([components count] == 1)
-    {
-      return self;
-    }
-
-  while ((component = [en nextObject]) != nil)
-    {
-      if (i > 0)
-	{
-	  result = [result stringByAppendingString: component];
-	  if ([[components lastObject] isEqual: component] == NO)
-	    {
-	      result = [result stringByAppendingString: @"."];
-	    }
-	}
-
-      i++;
-    }
-
-  return result;
-}
-
-@end
-
 static NSRecursiveLock *bindingLock = nil;
 static NSMapTable *classTable = NULL;      //available bindings
 static NSMapTable *objectTable = NULL;     //bound bindings

Source/NSOutlineView.m

@@ -1873,6 +1873,36 @@ Also returns the child index relative to this parent. */
 			@selector(outlineView:writeItems:toPasteboard:)];
 }
 
+- (NSString *) _stringByRemovingFirstKeyPath: (NSString *)path
+{
+  NSArray *components = [path componentsSeparatedByString: @"."];
+  NSString *result = @"";
+  NSEnumerator *en = [components objectEnumerator];
+  NSString *component = nil;
+  NSUInteger i = 0;
+
+  if ([components count] == 1)
+    {
+      return path;
+    }
+
+  while ((component = [en nextObject]) != nil)
+    {
+      if (i > 0)
+	{
+	  result = [result stringByAppendingString: component];
+	  if ([[components lastObject] isEqual: component] == NO)
+	    {
+	      result = [result stringByAppendingString: @"."];
+	    }
+	}
+
+      i++;
+    }
+
+  return result;
+}
+
 - (id) _objectValueForTableColumn: (NSTableColumn *)tb
 			      row: (NSInteger) index
 {
@@ -1885,7 +1915,7 @@ Also returns the child index relative to this parent. */
     {
       id theItem = [_items objectAtIndex: index];
       NSString *ikp = [info objectForKey: @"NSObservedKeyPath"];
-      NSString *keyPath = [ikp stringByRemovingFirstKeyPath];
+      NSString *keyPath = [self _stringByRemovingFirstKeyPath: ikp];
 
       // Here we are getting the last part of the keyPath since elsewhere in this class
       // we are recursively storing the contents of arrangedObjects (for example) to