[llvm] [AMDGPU] Remove redundant s_cmp_* after add X, 1 (PR #176962)

[via llvm-commits]

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@@ -2314,7 +2312,7 @@ body:             |
     S_BRANCH %bb.1
 
   bb.1:
-    successors: %bb.2(0x80000000)
+    successors: %bb.2
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LU-JOHN wrote:

Removed control-flow.

https://github.com/llvm/llvm-project/pull/176962