Remove [[some!]] unused variables #1320

Job	Run time
Detect File Changes	13s
Self Hosted (cpu, gt)	40m 41s
Github (ubuntu, mpi, debug, true)	55m 58s
Self Hosted (gpu, gt)	1h 16m 14s
Github (ubuntu, mpi, debug, false)	1h 9m 6s
Self Hosted (gpu, frontier)	46m 4s
Github (ubuntu, mpi, no-debug, true)	1h 7m 39s
Github (ubuntu, mpi, no-debug, false)	1h 30m 31s
Github (macos, mpi, debug, false)	24m 27s
Github (macos, mpi, no-debug, false)	40m 57s
Github (ubuntu, no-mpi, no-debug, false)	27m 51s
	8h 59m 41s

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