Remove classic make artifacts

[skliper]

Is your feature request related to a problem? Please describe.
Classic make no longer supported, *.mak files not used.

$ find ./ -name "*.mak"
./psp/fsw/mcp750-vxworks/make/compiler-opts.mak
./psp/fsw/mcp750-vxworks/make/link-rules.mak
./psp/fsw/mcp750-vxworks/src/psp.mak
./psp/fsw/pc-linux/make/compiler-opts.mak
./psp/fsw/pc-linux/make/link-rules.mak
./psp/fsw/pc-linux/src/psp.mak

Describe the solution you'd like
Remove

Describe alternatives you've considered
N/A

Additional context
None

Requester Info
Jacob Hageman - NASA/GSFC