chore: Remove dark mode feature flag #4685

Job	Run time
Install deps	14s
Build Self Hosted Image / Build Self Hosted App	4m 40s
Run Prettier Check	40s
Run Lint	22s
Run Fossa	15s
Generate runner indexes CRACO	5s
Generate runner indexes Vitest	12s
Run storybook	1m 35s
Run Type Checker	49s
Upload Bundle Stats - Production	1m 55s
Upload Bundle Stats - Staging	1m 55s
Codecov Startup / Codecov Startup	17s
Test Runner #0 - Vitest	1m 24s
Test Runner #0 - CRACO	1m 50s
Test Runner #1 - CRACO	1m 38s
Test Runner #2 - CRACO	1m 46s
Test Runner #3 - CRACO	1m 51s
Test Runner #4 - CRACO	1m 53s
Test Runner #5 - CRACO	1m 26s
Test Runner #6 - CRACO	1m 42s
Test Runner #7 - CRACO	1m 45s
Test Runner #8 - CRACO	1m 8s
Build App	1m 50s
Build Self Hosted Image / Push Self Hosted Release Image	0s
Build Self Hosted Image / Push Self Hosted Image	0s
Push Self Hosted Image	0s
	31m 12s

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