pylint: disable the similarities checker

This is a very slow checker, estimated to be O(n²) by its author; so
using it all the time is not good. It can be re-enabled on the command
line via “--disable-checker=”.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Olivier Tharan <olive@google.com>

pylintrc

@@ -93,6 +93,7 @@ ignore-docstrings = yes
 # Enable all checker(s) except those with the given id(s). This option
 # conflicts with the enable-checker option
 #disable-checker=
+disable-checker=similarities
 
 # Enable all messages in the listed categories (IRCWEF).
 #enable-msg-cat=