remove unnecessary VS project files #66

Job	Run time
Mac build (accelerate)	2m 46s
Linux build (openblas)	4m 20s
Linux build (openblas / static)	8m 12s
Linux build (mkl)	6m 35s
Mac build (accelerate / static)	3m 59s
Windows build (mkl)	4m 31s
Windows build (openblas)	4m 10s
Windows build openblas installed (mkl)	7m 57s
	42m 30s

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