[RISCV] Remove unused check-prefixes. NFC

Author: topperc

llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fp-buildvec.ll

@@ -1,7 +1,7 @@
 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
 
-; RUN: llc -mtriple=riscv32 -target-abi=ilp32d -mattr=+v,+zfh,+zvfh,+f,+d -verify-machineinstrs < %s | FileCheck %s --check-prefixes=CHECK,RV32,RV32V
-; RUN: llc -mtriple=riscv32 -target-abi=ilp32d -mattr=+v,+zfh,+zvfh,+zba,+zbb -verify-machineinstrs < %s | FileCheck %s --check-prefixes=CHECK,RV32,RV32VB
+; RUN: llc -mtriple=riscv32 -target-abi=ilp32d -mattr=+v,+zfh,+zvfh,+f,+d -verify-machineinstrs < %s | FileCheck %s --check-prefixes=CHECK,RV32
+; RUN: llc -mtriple=riscv32 -target-abi=ilp32d -mattr=+v,+zfh,+zvfh,+zba,+zbb -verify-machineinstrs < %s | FileCheck %s --check-prefixes=CHECK,RV32
 ; RUN: llc -mtriple=riscv64 -target-abi=lp64d -mattr=+v,+zfh,+zvfh,+f,+d -verify-machineinstrs < %s | FileCheck %s --check-prefixes=CHECK,RV64,RV64V
 ; RUN: llc -mtriple=riscv64 -target-abi=lp64d -mattr=+v,+zfh,+zvfh,+rva22u64 -verify-machineinstrs < %s | FileCheck %s --check-prefixes=CHECK,RV64,RVA22U64
 
@@ -1502,6 +1502,3 @@ define <8 x double> @buildvec_v8f64_zvl512(double %e0, double %e1, double %e2, d
   %v7 = insertelement <8 x double> %v6, double %e7, i64 7
   ret <8 x double> %v7
 }
-;; NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
-; RV32V: {{.*}}
-; RV32VB: {{.*}}