oe/recipeutils: Drop obsolete GITDIR reference

The fetcher GITDIR variable wase dropped a while back, drop the
obsolete reference to it (thanks Robert Day).

(From OE-Core rev: de035e687e26cef96e9b737c47bfc291bdfbea48)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oe/recipeutils.py

@@ -1061,7 +1061,6 @@ def get_recipe_upgrade_status(recipes=None):
     data_copy_list = []
     copy_vars = ('SRC_URI',
                  'PV',
-                 'GITDIR',
                  'DL_DIR',
                  'PN',
                  'CACHE',