Revert "Reland [X86] With large code model, put functions into .ltext with...

Revert "Reland [X86] With large code model, put functions into .ltext with large section flag (#73037)"

This reverts commit 4bf8a688.

This commit seems to be breaking the semantics of the
ObjectFile::isSectionText method, which breaks numba/llvmlite bindings.