Fixes #224 - Unused buttons when viewing file changes

[hhagenson28]

Related Issue/Keyword:

Issue #224 Follow up to PR #283

Description:

Same as #283 - just removed the event listeners for the save and cancel buttons as they were producing TypeErrors due to the buttons having already been removed in the previous PR.

Testing:

Steps for manual testing:

1. Ensure that the TypeError referenced in #224 is no longer apparent in the console when VisualGit is running.
2. All other functionality should still work the same as it did before, especially the file editing functionality.

Checklist:

• [x] Latest master merged/rebased into your feature branch
• [x] Tests covering all changes
• [x] Meets the projects coding conventions
• [x] No out of scope changes
• [x] @Mentioned any relevant team members
• [x] No failure when running the linter (npm run lint)
• [x] Included a relevant gif

[hhagenson28]

The commit history of this PR just got really messy, but you can have another look @Buster-Darragh-Major

[Buster-Darragh-Major]

LGTM 👍