[SLP][NFC]Remove incorrect attribure from the test, NFC.

Author: alexey-bataev

llvm/test/Transforms/SLPVectorizer/X86/gather-extractelements-different-bbs.ll

@@ -1,5 +1,5 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt -S -passes=slp-vectorizer -mtriple=x86_64-unknown-linux -mattr="-avx512pf,+avx512f,+avx512bw" -slp-threshold=-100 -slp-min-tree-size=0 < %s | FileCheck %s
+; RUN: opt -S -passes=slp-vectorizer -mtriple=x86_64-unknown-linux -mattr="+avx512f,+avx512bw" -slp-threshold=-100 -slp-min-tree-size=0 < %s | FileCheck %s
 
 define i32 @foo(i32 %a) {
 ; CHECK-LABEL: @foo(