[OpenMP] Remove %preload-tool definition from archer tests (#150779)

This was added in 2b8115b10b03013b9f8ae0aa56b0cd6a6a6dd4fd and it looks
like this wass essentially a copy paste from one of the other lit config
files. This substitution is unused within the tests however and contains
a deprecated %T directive, so remove it.

GitOrigin-RevId: b5c7482e8bfe4649afc19fad5957259696986353
1 file changed