Remove deprecated LLVM-style inline assembly

compiler/rustc_const_eval/src/interpret/step.rs

@@ -140,8 +140,6 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
             // Defined to do nothing. These are added by optimization passes, to avoid changing the
             // size of MIR constantly.
             Nop => {}
-
-            LlvmInlineAsm { .. } => throw_unsup_format!("inline assembly is not supported"),
         }
 
         self.stack_mut()[frame_idx].loc.as_mut().unwrap().statement_index += 1;

compiler/rustc_const_eval/src/transform/check_consts/check.rs

@@ -752,10 +752,6 @@ impl<'tcx> Visitor<'tcx> for Checker<'_, 'tcx> {
         self.super_statement(statement, location);
 
         match statement.kind {
-            StatementKind::LlvmInlineAsm { .. } => {
-                self.check_op(ops::InlineAsm);
-            }
-
             StatementKind::Assign(..)
             | StatementKind::SetDiscriminant { .. }
             | StatementKind::FakeRead(..)

compiler/rustc_const_eval/src/transform/validate.rs

@@ -352,7 +352,6 @@ impl<'a, 'tcx> Visitor<'tcx> for TypeChecker<'a, 'tcx> {
             StatementKind::SetDiscriminant { .. }
             | StatementKind::StorageLive(..)
             | StatementKind::StorageDead(..)
-            | StatementKind::LlvmInlineAsm(..)
             | StatementKind::Retag(_, _)
             | StatementKind::Coverage(_)
             | StatementKind::Nop => {}