Remove [[some!]] unused variables #1319

Job	Run time
Detect File Changes	11s
Self Hosted (cpu, gt)	41m 13s
Github (ubuntu, mpi, debug, true)	33m 43s
Self Hosted (gpu, gt)	1h 44m 34s
Github (ubuntu, mpi, debug, false)	1h 36m 18s
Self Hosted (gpu, frontier)	1h 8m 14s
Github (ubuntu, mpi, no-debug, true)	1h 7m 20s
Github (ubuntu, mpi, no-debug, false)	1h 30m 46s
Github (macos, mpi, debug, false)	34m 15s
Github (macos, mpi, no-debug, false)	39m 42s
Github (ubuntu, no-mpi, no-debug, false)	29m 7s
	10h 5m 23s

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