[MIRROR] Removes a duplicate bookcase in icebox permabrig library #1909

Job	Run time
Collect data for other tasks	14s
Run Linters	2m 10s
Windows Build	2m 55s
Compile Maps	4m 14s
Integration Tests (birdshot) / run_integration_tests	10m 39s
Integration Tests (blueshift) / run_integration_tests	12m 15s
Integration Tests (deltastation) / run_integration_tests	10m 52s
Integration Tests (gateway_test) / run_integration_tests	12m 31s
Integration Tests (icebox) / run_integration_tests	11m 19s
Integration Tests (kilostation2) / run_integration_tests	11m 4s
Integration Tests (metastation) / run_integration_tests	10m 58s
Integration Tests (multiz_debug) / run_integration_tests	10m 19s
Integration Tests (northstar) / run_integration_tests	11m 54s
Integration Tests (nssjourney) / run_integration_tests	10m 52s
Integration Tests (runtimestation) / run_integration_tests	9m 53s
Integration Tests (tramstation) / run_integration_tests	11m 37s
Integration Tests (voidraptor) / run_integration_tests	11m 3s
Alternate Tests (515, 1603, runtimestation) / run_integration_tests	9m 16s
Check Alternate Tests	1s
Compare Screenshot Tests	56s
	2h 45m 2s

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