fix pylint warnings

Author: Tom Gneuß

aas_core_codegen/protobuf/common.py

@@ -6,7 +6,7 @@
 from icontract import ensure, require
 
 from aas_core_codegen import intermediate
-from aas_core_codegen.common import Stripped, assert_never, Identifier
+from aas_core_codegen.common import Stripped, assert_never
 from aas_core_codegen.protobuf import naming as proto_naming
 
 

aas_core_codegen/protobuf/naming.py

@@ -2,8 +2,6 @@
 
 from typing import Union
 
-from icontract import ensure
-
 import aas_core_codegen.naming
 from aas_core_codegen import intermediate
 from aas_core_codegen.common import Identifier, assert_never