[llvm] [AArch64][SME] Remove unused ZA lazy-save (PR #81648)

[Sam Tebbs via llvm-commits]

================
@@ -29,6 +29,10 @@ def AArch64_save_zt : SDNode<"AArch64ISD::SAVE_ZT", SDTypeProfile<0, 2,
                              [SDTCisInt<0>, SDTCisPtrTy<1>]>,
                              [SDNPHasChain, SDNPSideEffect, SDNPMayStore]>;
 
+let usesCustomInserter = 1, Defs = [SP], Uses = [SP] in {
+  def ExpandZABuffer : Pseudo<(outs), (ins), []>, Sched<[WriteI]> {}
----------------
SamTebbs33 wrote:

Done!

https://github.com/llvm/llvm-project/pull/81648