Subzero, MIPS32: Remove --skip-unimplemented from lit tests

tests_lit/llvm2ice_tests/vector-icmp.ll

 ; This file checks support for comparing vector values with the icmp
 ; instruction.
 
 ; RUN: %p2i -i %s --filetype=obj --disassemble --args -O2 | FileCheck %s
 ; RUN: %p2i -i %s --filetype=obj --disassemble --args -Om1 | FileCheck %s
 
 ; RUN: %if --need=target_MIPS32 --need=allow_dump \
 ; RUN:   --command %p2i --filetype=asm --assemble --disassemble --target mips32\
-; RUN:   -i %s --args -O2 --skip-unimplemented \
+; RUN:   -i %s --args -O2 \
 ; RUN:   | %if --need=target_MIPS32 --need=allow_dump \
 ; RUN:   --command FileCheck --check-prefix MIPS32 %s
 
 ; Check that sext elimination occurs when the result of the comparison
 ; instruction is already sign extended.  Sign extension to 4 x i32 uses
 ; the pslld instruction on x86.
 define internal <4 x i32> @test_sext_elimination(<4 x i32> %a, <4 x i32> %b) {
 entry:
   %res.trunc = icmp eq <4 x i32> %a, %b
   %res = sext <4 x i1> %res.trunc to <4 x i32>
@@ skipping 6435 matching lines @@
 ; MIPS32: srl [[T13:.*]],[[BV_E3]],0x18
 ; MIPS32: andi [[T13]],[[T13]],0x1
 ; MIPS32: sll [[T12]],[[T12]],0x1f
 ; MIPS32: sll [[T13]],[[T13]],0x1f
 ; MIPS32: sltu [[T12]],[[T12]],[[T13]]
 ; MIPS32: srl [[T12]],[[T12]],0x18
 ; MIPS32: sll [[T4]],[[T4]],0x8
 ; MIPS32: srl [[T4]],[[T4]],0x8
 ; MIPS32: or [[RV_E3:.*]],[[T12]],[[T4]]
 }