Remove [[some!]] unused variables #1321

Job	Run time
Detect File Changes	13s
Self Hosted (cpu, gt)	41m 16s
Github (ubuntu, mpi, debug, true)	1h 8m 35s
Self Hosted (gpu, gt)	1h 20m 22s
Github (ubuntu, mpi, debug, false)	1h 12m 4s
Self Hosted (gpu, frontier)	47m 9s
Github (ubuntu, mpi, no-debug, true)	1h 7m 33s
Github (ubuntu, mpi, no-debug, false)	1h 30m 16s
Github (macos, mpi, debug, false)	35m 26s
Github (macos, mpi, no-debug, false)	40m 43s
Github (ubuntu, no-mpi, no-debug, false)	29m 28s
	9h 33m 5s

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