Test

chore: moving unused functions to improve code coverage #840

Job	Run time
unit_tests_win	6m 6s
s3_dates (3.9)	1m 44s
s1_s2_mpi (3.10, linear, rma)	2m 31s
s3_dates (3.10)	1m 42s
s1_s2 (3.9, linear, rma, asdf, false)	1m 54s
unit_tests	4m 47s
s1_s2 (3.9, robust, rma, asdf, false)	1m 54s
s1_s2 (3.9, nroot, rma, asdf, false)	2m 0s
s1_s2 (3.9, selective, rma, asdf, false)	1m 53s
s1_s2 (3.9, auto_covariance, rma, asdf, false)	1m 56s
s1_s2 (3.9, pws, rma, asdf, false)	2m 0s
s1_s2 (3.10, linear, rma, asdf, false)	1m 52s
s1_s2 (3.10, robust, rma, asdf, false)	1m 52s
s1_s2 (3.10, nroot, rma, asdf, false)	1m 53s
s1_s2 (3.10, selective, rma, asdf, false)	1m 59s
s1_s2 (3.10, auto_covariance, rma, asdf, false)	1m 55s
s1_s2 (3.10, pws, rma, asdf, false)	1m 55s
s1_s2 (linear, 3.10, no, zarr, true)	1m 55s
s1_s2 (all, 3.9, phase_only, numpy)	1m 57s
	43m 45s

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