fix: Remove unused imports in several modules #752

[nautics889]

Removed unused imports in:

• terminator
• terminatorlib/plugins/dir_open.py
• terminatorlib/terminal.py
• terminatorlib/terminal_popup_menu.py
• terminatorlib/terminator.py
• tests/test_signalman.py

---

All of those imports had been used before, according to the Git history, but were not removed as the code was updated and they are no longer being used.

[mattrose]

I'm getting the following conflict trying to merge this into my master

Switched to a new branch 'nautics889-issue-752-remove-unused-imports'
From https://github.com/nautics889/terminator
 * branch              issue-752-remove-unused-imports -> FETCH_HEAD
Auto-merging terminatorlib/config.py
Auto-merging terminatorlib/plugins/mousefree_url_handler.py
CONFLICT (add/add): Merge conflict in terminatorlib/plugins/mousefree_url_handler.py
Auto-merging terminatorlib/prefseditor.py
error: could not apply 0ae2aba1... 1) Mouse less/free opening / yanking feature
hint: Resolve all conflicts manually, mark them as resolved with
hint: "git add/rm <conflicted_files>", then run "git rebase --continue".
hint: You can instead skip this commit: run "git rebase --skip".
hint: To abort and get back to the state before "git rebase", run "git rebase --abort".
Could not apply 0ae2aba1... 1) Mouse less/free opening / yanking feature 2) plugin_util  file to assist this and other plugins with key-press Helper function 3) adding Key Binding Help Functions in above (2) to config and preferences->keybinding to have a consistent behavior

I could redo the merge with your changes, but I'd rather leave it up to you. Can you let me know if you can fix this up easily?

[nautics889]

@mattrose sure, I guess rebase on top of the current master should help.

Can you try it now, please? CI checks are passed, none divergence between this branch and master, it should be able to merge.

[mattrose]

merging. Sorry about the wait