[BOLT] Remove MSVC builder
MSVC builder takes the longest and doesn't provide clear value to us right now.
Because of it, the other builds are throttled for 30+ mins.
Remove it for now.
Differential Revision: https://reviews.llvm.org/D138548
Diffusion LLVM Github Zorg ee07c2105df7
Amir on Nov 29 2022, 8:20 PM.Authored by