Removing a switch statement that contains only a default label; NFC.

llvm-svn: 270444
diff --git a/llvm/lib/Target/X86/AsmParser/X86AsmParser.cpp b/llvm/lib/Target/X86/AsmParser/X86AsmParser.cpp
index 836de26..807eb11 100644
--- a/llvm/lib/Target/X86/AsmParser/X86AsmParser.cpp
+++ b/llvm/lib/Target/X86/AsmParser/X86AsmParser.cpp
@@ -2527,9 +2527,7 @@
 }
 
 bool X86AsmParser::processInstruction(MCInst &Inst, const OperandVector &Ops) {
-  switch (Inst.getOpcode()) {
-  default: return false;
-  }
+  return false;
 }
 
 static const char *getSubtargetFeatureName(uint64_t Val);