[llvm] [X86] Remove LLD command in LIT test introduced in #136660 (PR #137794)

[Feng Zou via llvm-commits]

fzou1 wrote:

Test is failed as ld.lld command not found: https://lab.llvm.org/buildbot/#/builders/185/builds/17441

https://github.com/llvm/llvm-project/pull/137794