Remove comments. NFC.

Author: dtcxzyw

clang/lib/CodeGen/CGExprConstant.cpp

@@ -1883,7 +1883,6 @@ llvm::Constant *ConstantEmitter::tryEmitPrivateForVarInit(const VarDecl &D) {
 
   // Try to emit the initializer.  Note that this can allow some things that
   // are not allowed by tryEmitPrivateForMemory alone.
-  // Bail out on constexpr-unknown values since they are invalid in CodeGen.
   if (APValue *value = D.evaluateValue()) {
     assert(!value->allowConstexprUnknown() &&
            "Constexpr unknown values are not allowed in CodeGen");