Update linting for utils

utils/build_appimage.py

@@ -17,7 +17,7 @@ General Public License for more details.
 
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <https://www.gnu.org/licenses/>.
-"""
+"""  # noqa
 from __future__ import annotations
 
 import argparse
@@ -134,5 +134,3 @@ def appImage(args: argparse.Namespace) -> None:
     toUpload(bldFile)
     toUpload(updFile)
     toUpload(shaFile)
-
-    return