[llvm] [IR] Remove support for shl constant expressions (PR #96037)

[Yingwei Zheng via llvm-commits]

================
@@ -4186,7 +4188,6 @@ bool LLParser::parseValID(ValID &ID, PerFunctionState *PFS, Type *ExpectedTy) {
   case lltok::kw_add:
   case lltok::kw_sub:
   case lltok::kw_mul:
-  case lltok::kw_shl:
----------------
dtcxzyw wrote:

`|| Opc == Instruction::Shl` can be removed now :)


https://github.com/llvm/llvm-project/pull/96037