Remove redundant --check-prefixes

Author: lukel97

llvm/test/CodeGen/RISCV/rvv/vector-splice.ll

@@ -1,8 +1,8 @@
 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
-; RUN: llc -mtriple riscv32 -mattr=+m,+f,+d,+v,+zvfhmin,+zvfbfmin < %s | FileCheck %s --check-prefixes=CHECK
-; RUN: llc -mtriple riscv64 -mattr=+m,+f,+d,+v,+zvfhmin,+zvfbfmin < %s | FileCheck %s --check-prefixes=CHECK
-; RUN: llc -mtriple riscv32 -mattr=+m,+f,+d,+v,+zvfh,+zvfbfmin < %s | FileCheck %s --check-prefixes=CHECK
-; RUN: llc -mtriple riscv64 -mattr=+m,+f,+d,+v,+zvfh,+zvfbfmin < %s | FileCheck %s --check-prefixes=CHECK
+; RUN: llc -mtriple riscv32 -mattr=+m,+f,+d,+v,+zvfhmin,+zvfbfmin < %s | FileCheck %s
+; RUN: llc -mtriple riscv64 -mattr=+m,+f,+d,+v,+zvfhmin,+zvfbfmin < %s | FileCheck %s
+; RUN: llc -mtriple riscv32 -mattr=+m,+f,+d,+v,+zvfh,+zvfbfmin < %s | FileCheck %s
+; RUN: llc -mtriple riscv64 -mattr=+m,+f,+d,+v,+zvfh,+zvfbfmin < %s | FileCheck %s
 
 ; Tests assume VLEN=128 or vscale_range_min=2.