removed support for vector scale parameter #452

Job	Run time
build-docs (3.8)	1m 43s
build-jax (3.8)	1m 38s
build-numpy (3.8, short)	40s
build-jax (3.9)	45s
build-mpi (3.9)	1m 33s
build-torch (3.8)	57s
build-jax (3.10)	46s
build-numpy (3.8, optimize)	43s
build-mpi (3.10)	1m 29s
build-torch (3.9)	58s
build-numpy (3.8, multivariate)	41s
build-torch (3.10)	1m 41s
build-numpy (3.8, optimize-experimental)	40s
build-numpy (3.9, short)	44s
build-numpy (3.9, optimize)	41s
build-numpy (3.9, multivariate)	43s
build-numpy (3.9, optimize-experimental)	42s
build-numpy (3.10, short)	56s
build-numpy (3.10, optimize)	41s
build-numpy (3.10, multivariate)	42s
build-numpy (3.10, optimize-experimental)	44s
	20m 7s

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