rlib2: Remove leftover DOC_URI constant

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

lib/rapi/rlib2.py

@@ -529,9 +529,6 @@ class R_2_instances_name_reinstall(baserlib.R_Generic):
   Implements an instance reinstall.
 
   """
-
-  DOC_URI = "/2/instances/[instance_name]/reinstall"
-
   def POST(self):
     """Reinstall an instance.