[X86][BtVer2] Remove 128-bit F16C InstRW overrides.

These are already handled identically by WriteCvtF2F.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@330318 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed