Unused parameters and variable

[blainNTIA]

There are a handful of unused function arguments and an unused variable that we should consider removing.

Severity	Code	Description	File	Line
Warning	C4100	'path': unreferenced formal parameter	src\p528\LineOfSight.cpp	5
Warning	C4100	'path': unreferenced formal parameter	src\p528\LineOfSight.cpp	36
Warning	C4100	'path': unreferenced formal parameter	src\p528\LineOfSight.cpp	58
Warning	C4100	'path': unreferenced formal parameter	src\p528\Troposcatter.cpp	21
Warning	C4189	'rtn': local variable is initialized but not referenced	src\p528\ValidateInputs.cpp	24