chore: fix linter

Author: dtopuzov

Diff for: core/base_test/tns_test.py

@@ -118,7 +118,7 @@ def get_screenshots():
             Folder.create(folder=os.path.dirname(png_path))
             pyautogui.screenshot().save(png_path)
             Log.info("Saved host os screen at {0}".format(png_path))
-        except Exception as e:
+        except Exception:
             Log.warning('Failed to take screenshot of host os.')
 
         # get device screenshots