tests: Remove duplicate CHECK lines

Author: youngbash88

llvm/test/CodeGen/ARM/shifter_operand.ll

@@ -121,7 +121,6 @@ define i32 @test_orr_extract_from_mul_1(i32 %x, i32 %y) {
 ; CHECK-THUMB-NEXT:    orrs r0, r1
 ; CHECK-THUMB-NEXT:    bx lr
 entry:
-; CHECK-THUMB: orrs r0, r1
   %mul = mul i32 %y, 63767
   %or = or i32 %mul, %x
   ret i32 %or

llvm/test/CodeGen/ARM/sxt_rot.ll

@@ -22,7 +22,6 @@ define signext i8 @test1(i32 %A) {
 ; CHECK-V7:       @ %bb.0:
 ; CHECK-V7-NEXT:    sbfx r0, r0, #8, #8
 ; CHECK-V7-NEXT:    bx lr
-; CHECK-V7: sbfx r0, r0, #8, #8
   %B = lshr i32 %A, 8
   %C = shl i32 %A, 24
   %D = or i32 %B, %C