[LoongArch][test] Revert "Pre-commit for fix codegen for ISD::ROTR". NFC

This reverts commit bc829b5.

Author: heiher

llvm/test/CodeGen/LoongArch/rotl-rotr.ll

@@ -504,41 +504,6 @@ define i64 @rotr_64_mask_or_128_or_64(i64 %x, i64 %y) nounwind {
   ret i64 %f
 }
 
-define signext i32 @rotr_64_trunc_32(i64 %x, i64 %y) nounwind {
-; LA32-LABEL: rotr_64_trunc_32:
-; LA32:       # %bb.0:
-; LA32-NEXT:    srl.w $a3, $a0, $a2
-; LA32-NEXT:    xori $a4, $a2, 31
-; LA32-NEXT:    slli.w $a5, $a1, 1
-; LA32-NEXT:    sll.w $a4, $a5, $a4
-; LA32-NEXT:    or $a3, $a3, $a4
-; LA32-NEXT:    addi.w $a4, $a2, -32
-; LA32-NEXT:    slti $a5, $a4, 0
-; LA32-NEXT:    maskeqz $a3, $a3, $a5
-; LA32-NEXT:    srl.w $a1, $a1, $a4
-; LA32-NEXT:    masknez $a1, $a1, $a5
-; LA32-NEXT:    or $a1, $a3, $a1
-; LA32-NEXT:    sub.w $a3, $zero, $a2
-; LA32-NEXT:    sll.w $a0, $a0, $a3
-; LA32-NEXT:    ori $a3, $zero, 32
-; LA32-NEXT:    sub.w $a2, $a3, $a2
-; LA32-NEXT:    srai.w $a2, $a2, 31
-; LA32-NEXT:    and $a0, $a2, $a0
-; LA32-NEXT:    or $a0, $a1, $a0
-; LA32-NEXT:    ret
-;
-; LA64-LABEL: rotr_64_trunc_32:
-; LA64:       # %bb.0:
-; LA64-NEXT:    rotr.w $a0, $a0, $a1
-; LA64-NEXT:    ret
-  %z = sub i64 64, %y
-  %b = lshr i64 %x, %y
-  %c = shl i64 %x, %z
-  %d = or i64 %b, %c
-  %e = trunc i64 %d to i32
-  ret i32 %e
-}
-
 define signext i32 @rotri_i32(i32 signext %a) nounwind {
 ; LA32-LABEL: rotri_i32:
 ; LA32:       # %bb.0: