Revert "LLVM 23: Adapt codegen test to moved assume"

This reverts commit 4691890.

Author: saethlin

tests/codegen-llvm/issues/issue-107681-unwrap_unchecked.rs

@@ -1,6 +1,4 @@
 //@ compile-flags: -Copt-level=3
-//@ filecheck-flags: --implicit-check-not 'br {{.*}}' --implicit-check-not 'select'
-//@ min-llvm-version: 22
 
 // Test for #107681.
 // Make sure we don't create `br` or `select` instructions.
@@ -13,8 +11,10 @@ use std::slice::Iter;
 #[no_mangle]
 pub unsafe fn foo(x: &mut Copied<Iter<'_, u32>>) -> u32 {
     // CHECK-LABEL: @foo(
-    // CHECK: [[INNER:%.*]] = load ptr, ptr %x
-    // CHECK: [[RET:%.*]] = load i32, ptr [[INNER]]
-    // CHECK: ret i32 [[RET]]
+    // CHECK-NOT: br {{.*}}
+    // CHECK-NOT: select
+    // CHECK: [[RET:%.*]] = load i32, ptr
+    // CHECK-NEXT: assume
+    // CHECK-NEXT: ret i32 [[RET]]
     x.next().unwrap_unchecked()
 }