Remove incorrectly added args in GUIWebsocketHandler methods

[krisgesling]

Description

PR #2879 updated the websocket-client and changed function signatures to account for API changes in that package. The instances in this PR were falsely changed as the GUI bus does not use the websocket-client.

Consistency would be good however modifying these for the GUI bus would require significant work. For now we have two slightly different bus interfaces.

This was causing the GUI to crash on click events and on close.

Thanks to @AIIX for help getting to the right answer on this one!

How to test

Test 1:

• Launch Mycroft
• Launch GUI from terminal
• Kill the GUI (ctrl+c)
• See TypeError: on_close() missing 1 required positional argument: '_'
• Apply commit, rinse and repeat.

Test 2:

• Launch Mycroft
• Launch GUI from terminal
• trigger some GUI skill
• click on it

Contributor license agreement signed?

• [x] CLA

[devops-mycroft]

Voight Kampff Integration Test Succeeded (Results)

[krisgesling]

Failure seems like it was a brief outage in the DLF radio station. Working locally now so retrying.

[AIIX]

Fixes the crash, please merge!

[krisgesling]

@AIIX - can you give the PR an approving review? Then I can merge it in.