[llvm] [VPlan] Simplify branch on False in VPlan transform (NFC). (PR #140409)

[via llvm-commits]

================
@@ -1160,6 +1155,8 @@ class VPPhiAccessors {
     return getAsRecipe()->getNumOperands();
   }
 
+  void removeIncomingValue(VPBlockBase *VPB) const;
----------------
ayalz wrote:

```suggestion
  /// Removes the incoming value corresponding to \p IncomingBlock, which must be a predecessor.
  void removeIncomingValueFor(VPBlockBase *IncomingBlock) const;
```

https://github.com/llvm/llvm-project/pull/140409