devtool: upgrade: remove erroneous error when not renaming recipe

If we're upgrading a git recipe the recipe file usually won't need
renaming; for some unknown reason we were throwing an error here which
isn't correct.

(From OE-Core rev: 656348dff9bc9dd1cafc8fff11e5e374e3667f0f)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/lib/devtool/upgrade.py

@@ -117,7 +117,6 @@ def _rename_recipe_file(bpn, oldpv, newpv, path):
         recipe = "%s_git.bb" % bpn
         if os.path.isfile(os.path.join(path, recipe)):
             newrecipe = recipe
-            raise DevtoolError("Original recipe not found on workspace")
     return os.path.join(path, newrecipe)
 
 def _rename_recipe_files(bpn, oldpv, newpv, path):