Remove [[some!]] unused variables #1329

Job	Run time
Detect File Changes	11s
Self Hosted (cpu, gt)	41m 25s
Self Hosted (gpu, gt)	39m 22s
Github (ubuntu, mpi, debug, true)	45m 18s
Self Hosted (gpu, frontier)	35m 55s
Github (ubuntu, mpi, debug, false)	2h 6m 24s
Github (ubuntu, mpi, no-debug, true)	1h 11m 32s
Github (ubuntu, mpi, no-debug, false)	1h 30m 38s
Github (macos, mpi, debug, false)	34m 26s
Github (macos, mpi, no-debug, false)	36m 53s
Github (ubuntu, no-mpi, no-debug, false)	28m 54s
	9h 10m 58s

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