refactor: drop duplicate entry

Signed-off-by: Joris Clement <[email protected]>

lib/rouge/lexers/python.rb

@@ -20,7 +20,7 @@ def self.keywords
         @keywords ||= %w(
           assert break continue del elif else except exec
           finally for global if lambda pass print raise
-          return try while yield as with from import yield
+          return try while yield as with from import
           async await nonlocal
         )
       end