Remove incorrect examples from memory view documentation.

Closes #2664.

docs/src/userguide/memoryviews.rst

@@ -56,16 +56,11 @@ A complete 3D view::
 
     cdef int[:,:,:] view3D = exporting_object
 
-A 2D view that restricts the first dimension of a buffer to 100 rows
-starting at the second (index 1) and then skips every second (odd) row::
-
-    cdef int[1:102:2,:] partial_view = exporting_object
-
-This also works conveniently as function arguments:
+They also work conveniently as function arguments:
 
 .. code-block:: cython
 
-    def process_3d_buffer(int[1:102:2,:] view not None):
+    def process_3d_buffer(int[:,:] view not None):
         ...
 
 The ``not None`` declaration for the argument automatically rejects