Clipboard: update extremely old docs

Author: akshayaurora

kivy/core/clipboard/__init__.py

@@ -8,20 +8,10 @@
 Usage example::
 
     >>> from kivy.core.clipboard import Clipboard
-    >>> Clipboard.get_types()
-    ['TIMESTAMP', 'TARGETS', 'MULTIPLE', 'SAVE_TARGETS', 'UTF8_STRING',
-    'COMPOUND_TEXT', 'TEXT', 'STRING', 'text/plain;charset=utf-8',
-    'text/plain']
-    >>> Clipboard.get('TEXT')
-    'Hello World'
-    >>> Clipboard.put('Great', 'UTF8_STRING')
-    >>> Clipboard.get_types()
-    ['UTF8_STRING']
-    >>> Clipboard.get('UTF8_STRING')
-    'Great'
-
-.. note:: The main implementation relies on Pygame and works well with
-          text/strings. Anything else might not work the same on all platforms.
+    >>> Clipboard.copy('data')
+    >>> Clipboard.paste()
+    'data'
+
 '''
 
 __all__ = ('ClipboardBase', 'Clipboard')