Delete a dead store found by PVS-Studio.

Quite sad we still aren't really using aggressive dead code warnings
from Clang that we could potentially use to catch this and so many other
things.

llvm-svn: 285936

llvm/lib/Target/Hexagon/MCTargetDesc/HexagonMCAsmInfo.cpp

@@ -22,7 +22,6 @@ HexagonMCAsmInfo::HexagonMCAsmInfo(const Triple &TT) {
   Data16bitsDirective = "\t.half\t";
   Data32bitsDirective = "\t.word\t";
   Data64bitsDirective = nullptr;  // .xword is only supported by V9.
-  ZeroDirective = "\t.skip\t";
   CommentString = "//";
 
   LCOMMDirectiveAlignmentType = LCOMM::ByteAlignment;