[Driver] Fix erroneous warning for -fcx-limited-range and -fcx-fortran-rules. (#79821)

The options `-fcx-limited-range` and `-fcx-fortran-rules` were added in
_https://github.com/llvm/llvm-project/pull/70244_

The code adding the options introduced an erroneous warning.
`$ clang -c -fcx-limited-range t1.c` 
`clang: warning: overriding '' option with '-fcx-limited-range'
[-Woverriding-option]`
and
`$ clang -c -fcx-fortran-rules t1.c`
`clang: warning: overriding '' option with '-fcx-fortran-rules'
[-Woverriding-option]`

The warning doesn't make sense. This patch removes it.