NEM_SLICE: Remove a template array which was not needed to be a template #91

Job	Run time
build-deps (gnu, V110, 4.9.2, 4.4.0)	4m 13s
build-deps (clang, V110, 4.9.2, 4.4.0)	3m 36s
build-deps (mpi, V110, 4.9.2, 4.4.0)	4m 13s
Debug serial build	6m 8s
Debug parallel build	6m 14s
Threadsafe ON, No Fortran	3m 51s
Threadsafe ON, Parallel, No Fortran	5m 32s
Sanitize address, no fortran	5m 40s
Sanitize undefined	6m 38s
Sanitize integer	4m 35s
GTest Enabled	5m 43s
No applications, legacy, or fortran	3m 50s
CATALYST2, parallel	8m 39s
KOKKOS, parallel	7m 53s
No deprecated exodus functions	8m 46s
Use modern CMake configure of netCDF and HDF5 packages with GTest	8m 14s
ADIOS2 enabled	11m 16s
FAODEL and METIS enabled	11m 46s
	1h 56m 47s

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