[llvm] [VPlan] Remove SCEVToExpansion mapping (NFC). (PR #164490)

[via llvm-commits]

================
@@ -4172,11 +4172,6 @@ class VPlan {
   /// definitions are VPValues that hold a pointer to their underlying IR.
   SmallVector<VPValue *, 16> VPLiveIns;
 
-  /// Mapping from SCEVs to the VPValues representing their expansions.
-  /// NOTE: This mapping is temporary and will be removed once all users have
-  /// been modeled in VPlan directly.
----------------
ayalz wrote:

Has this NOTE been taken care of, i.e., all users are modeled in VPlan directly?

https://github.com/llvm/llvm-project/pull/164490