[RISCV] Remove unused check prefixes from double maximum/minimum test. NFC

Author: tclin914

llvm/test/CodeGen/RISCV/double-maximum-minimum.ll

@@ -1,10 +1,10 @@
 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
 ; RUN: sed 's/iXLen/i32/g' %s | llc -mtriple=riscv32 -mattr=+d \
 ; RUN:   -verify-machineinstrs -target-abi=ilp32d \
-; RUN:   | FileCheck -check-prefixes=CHECKIFD,RV32IFD %s
+; RUN:   | FileCheck -check-prefixes=CHECKIFD %s
 ; RUN: sed 's/iXLen/i64/g' %s | llc -mtriple=riscv64 -mattr=+d \
 ; RUN:   -verify-machineinstrs -target-abi=lp64d \
-; RUN:   | FileCheck -check-prefixes=CHECKIFD,RV64IFD %s
+; RUN:   | FileCheck -check-prefixes=CHECKIFD %s
 ; RUN: sed 's/iXLen/i32/g' %s | llc -mtriple=riscv32 -mattr=+zdinx \
 ; RUN:   -verify-machineinstrs -target-abi=ilp32 \
 ; RUN:   | FileCheck -check-prefix=RV32IZFINXZDINX %s
@@ -297,7 +297,3 @@ define double @fmaximum_nnan_op_f64(double %a, double %b) nounwind {
   %1 = call double @llvm.maximum.f64(double %c, double %d)
   ret double %1
 }
-
-;; NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
-; RV32IFD: {{.*}}
-; RV64IFD: {{.*}}