Removed obsolete cache invalidation code from get_sources function #12057

Job	Run time
Get changes	8s
Lint files	2m 55s
Get image tag	1s
Validate CODEOWNERS	8s
Determine images to build and publish	8s
Run checks for Python packages/*	1s
Build Docker images	1s
Run checks for JS packages/*	1s
Check Nuxt build	1s
Run Nuxt checks	1s
Run Playwright tests	1s
Build full-stack docs	1s
Run checks for Python packages/*	1s
Run checks for JS packages/*	1s
Run catalog checks	1s
Run Django checks	1s
Run tests for the API	1s
Run tests for the catalog	1s
Run tests for indexer worker	1s
Run tests for ingestion-server	1s
Run Nuxt checks	1s
Collect Lighthouse CI results	1s
Load test local frontend	1s
Run Playwright tests	1s
Post Playwright test debugging instructions	1s
Run Django checks	1s
Publish Docker images	1s
Emit full-stack docs	1s
Deploy staging frontend	1s
Deploy staging API	1s
Send Slack report	1s
	3m 46s

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