[clang-linker-wrapper][NFC] Remove dead code

[bader]

InputFiles variable defined in the function is not used. If statements below define local scope variables with the same name.

[asudarsa]

Good catch Alexey. I think this variable was missed as the code evolved over time.
Also, there will be considerable cleanup if/when we fully move to using clang-sycl-linker.

Thanks