[ConstProp] Remove unused check-prefixes
Just use default CHECK and remove duplicate RUN
diff --git a/llvm/test/Transforms/InstSimplify/ConstProp/overflow-ops.ll b/llvm/test/Transforms/InstSimplify/ConstProp/overflow-ops.ll
index a8c1074..c97d2e0 100644
--- a/llvm/test/Transforms/InstSimplify/ConstProp/overflow-ops.ll
+++ b/llvm/test/Transforms/InstSimplify/ConstProp/overflow-ops.ll
@@ -1,8 +1,5 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt < %s -instsimplify -S | FileCheck %s --check-prefixes=CHECK,CONSTPROP
-; RUN: opt < %s -instsimplify -S | FileCheck %s --check-prefixes=CHECK,INSTSIMPLIFY
-; We must *NOT* have any check-lines with prefixes other than CHECK here.
-; If we do, that means the rules are different between the passes.
+; RUN: opt < %s -instsimplify -S | FileCheck %s
declare {i8, i1} @llvm.uadd.with.overflow.i8(i8, i8)
declare {i8, i1} @llvm.usub.with.overflow.i8(i8, i8)
