Revert "[SLPVectorizer] Pre-commit a test for D85759"

This reverts commit 94791970de.

The test is failing on multiple bots, event though it passes for me
locally. Reverting while I investigate further.

llvm/test/Transforms/SLPVectorizer/WebAssembly/no-vectorize-rotate.ll

@@ -1,39 +0,0 @@
-; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt < %s -slp-vectorizer -instcombine -S | FileCheck %s
-
-; Regression test for a bug in the SLP vectorizer that was causing
-; these rotates to be incorrectly combined into a vector rotate.
-
-; The bug fix is at https://reviews.llvm.org/D85759. This test has
-; been pre-committed to demonstrate the regressed behavior and provide
-; a clear diff for the bug fix.
-
-target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
-target triple = "wasm32-unknown-unknown"
-
-define void @foo(<2 x i64> %x, <4 x i32> %y, i64* %out) #0 {
-; CHECK-LABEL: @foo(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x i32> [[Y:%.*]], <4 x i32> undef, <2 x i32> <i32 2, i32 3>
-; CHECK-NEXT:    [[TMP2:%.*]] = zext <2 x i32> [[TMP1]] to <2 x i64>
-; CHECK-NEXT:    [[TMP3:%.*]] = call <2 x i64> @llvm.fshl.v2i64(<2 x i64> [[X:%.*]], <2 x i64> [[X]], <2 x i64> [[TMP2]])
-; CHECK-NEXT:    [[TMP4:%.*]] = bitcast i64* [[OUT:%.*]] to <2 x i64>*
-; CHECK-NEXT:    store <2 x i64> [[TMP3]], <2 x i64>* [[TMP4]], align 8
-; CHECK-NEXT:    ret void
-;
-  %a = extractelement <2 x i64> %x, i32 0
-  %b = extractelement <4 x i32> %y, i32 2
-  %conv6 = zext i32 %b to i64
-  %c = tail call i64 @llvm.fshl.i64(i64 %a, i64 %a, i64 %conv6)
-  store i64 %c, i64* %out
-  %d = extractelement <2 x i64> %x, i32 1
-  %e = extractelement <4 x i32> %y, i32 3
-  %conv17 = zext i32 %e to i64
-  %f = tail call i64 @llvm.fshl.i64(i64 %d, i64 %d, i64 %conv17)
-  %arrayidx2 = getelementptr inbounds i64, i64* %out, i32 1
-  store i64 %f, i64* %arrayidx2
-  ret void
-}
-
-declare i64 @llvm.fshl.i64(i64, i64, i64)
-
-attributes #0 = {"target-cpu"="generic" "target-features"="+simd128"}