chore: remove nim unused imports

[igor-sirotin]

There're 4 warning left in logs. Those are false-warns, these imports are actually used.

/Users/igorsirotin/Repositories/Status/status-desktop/src/app/modules/shared_modules/keycard_popup/module.nim(8, 51) Warning: imported and not used: 'atc' [UnusedImport]
/Users/igorsirotin/Repositories/Status/status-desktop/src/app/modules/startup/module.nim(9, 18) Warning: imported and not used: 'main_constants' [UnusedImport]
/Users/igorsirotin/Repositories/Status/status-desktop/src/app/modules/startup/module.nim(11, 46) Warning: imported and not used: 'atc' [UnusedImport]
/Users/igorsirotin/Repositories/Status/status-desktop/src/app/modules/shared_modules/add_account/module.nim(15, 38) Warning: imported and not used: 'account_constants' [UnusedImport]

[jrainville]

Nice, that's something I wanted to do for a while. Those were annoying

[status-im-auto]

Jenkins Builds

❔	Commit	#️⃣	Finished (UTC)	Duration	Platform	Result
✔️	265a31b	#1	2023-11-17 15:55:24	~6 min	tests/nim	📄log
✔️	265a31b	#1	2023-11-17 15:58:33	~9 min	macos/aarch64	🍎dmg
✔️	265a31b	#1	2023-11-17 15:59:43	~10 min	macos/x86_64	🍎dmg
✔️	265a31b	#1	2023-11-17 16:01:49	~12 min	tests/ui	📄log
✔️	265a31b	#1	2023-11-17 16:03:53	~15 min	linux/x86_64	📦tgz
✔️	265a31b	#1	2023-11-17 16:16:55	~28 min	windows/x86_64	💿exe
✔️	265a31b	#1	2023-11-17 16:23:35	~34 min	tests/e2e	📄log
✔️	e837a48	#2	2023-11-17 16:41:27	~5 min	macos/aarch64	🍎dmg
✔️	e837a48	#2	2023-11-17 16:42:18	~6 min	tests/nim	📄log
✔️	e837a48	#2	2023-11-17 16:44:47	~8 min	macos/x86_64	🍎dmg
✔️	e837a48	#2	2023-11-17 16:48:02	~12 min	tests/ui	📄log
✔️	e837a48	#2	2023-11-17 16:50:30	~14 min	linux/x86_64	📦tgz
✖️	e837a48	#2	2023-11-17 17:06:41	~30 min	tests/e2e	📄log
✔️	e837a48	#2	2023-11-17 17:15:40	~39 min	windows/x86_64	💿exe
✔️	e837a48	#3	2023-11-17 18:00:23	~32 min	tests/e2e	📄log

[MishkaRogachev]

Cool!