Fix minor issues

gns3server/handlers/api/project_handler.py

@@ -217,7 +217,7 @@ class ProjectHandler:
                 response.write(("{}\n".format(msg)).encode("utf-8"))
             except asyncio.futures.CancelledError as e:
                 break
-            except asyncio.futures.TimeoutError as e:
+            except asyncio.futures.TimeoutError:
                 response.write("{\"action\": \"ping\"}\n".encode("utf-8"))
         project.stop_listen_queue(queue)
         if project.id in ProjectHandler._notifications_listening:

gns3server/handlers/upload_handler.py

@@ -104,15 +104,6 @@ class UploadHandler:
     def backup_images(request, response):
         yield from UploadHandler._backup_directory(request, response, UploadHandler.image_directory())
 
-    @classmethod
-    @Route.get(
-        r"/backup/projects.tar",
-        description="Backup GNS3 projects",
-        api_version=None
-    )
-    def backup_images(request, response):
-        yield from UploadHandler._backup_directory(request, response, UploadHandler.project_directory())
-
     @staticmethod
     def _restore_directory(file, directory):
         """

gns3server/run.py

@@ -173,7 +173,7 @@ def pid_lock(path):
         with open(path, 'w+') as f:
             f.write(str(os.getpid()))
     except OSError as e:
-        log.critical("Can't write pid file %s: %s", args.pid, str(e))
+        log.critical("Can't write pid file %s: %s", path, str(e))
         sys.exit(1)