Subzero: Delete szdiff.py tests and ERRORS tests.

tests_lit/llvm2ice_tests/simple-loop.ll

 ; This tests a simple loop that sums the elements of an input array.
 ; The O2 check patterns represent the best code currently achieved.
 
 ; RUN: %p2i -i %s --args -O2 --verbose none \
 ; RUN:   | llvm-mc -triple=i686-none-nacl -filetype=obj \
 ; RUN:   | llvm-objdump -d -symbolize -x86-asm-syntax=intel - | FileCheck %s
 ; RUN: %p2i -i %s --args -Om1 --verbose none \
 ; RUN:   | llvm-mc -triple=i686-none-nacl -filetype=obj \
 ; RUN:   | llvm-objdump -d -symbolize -x86-asm-syntax=intel - \
 ; RUN:   | FileCheck --check-prefix=OPTM1 %s
-; RUN: %p2i -i %s --args --verbose none | FileCheck --check-prefix=ERRORS %s
 
 define i32 @simple_loop(i32 %a, i32 %n) {
 entry:
   %cmp4 = icmp sgt i32 %n, 0
   br i1 %cmp4, label %for.body, label %for.end
 
 for.body:
   %i.06 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
   %sum.05 = phi i32 [ %add, %for.body ], [ 0, %entry ]
   %gep_array = mul i32 %i.06, 4
@@ skipping 23 matching lines @@
 ; Check for comparing the induction variable against the loop size.
 ; CHECK-NEXT: cmp [[IREG]],
 ; CHECK-NEXT: jl -{{[0-9]}}
 ;
 ; There's nothing remarkable under Om1 to test for, since Om1 generates
 ; such atrocious code (by design).
 ; OPTM1-LABEL: simple_loop
 ; OPTM1:      cmp {{.*}}, 0
 ; OPTM1:      jg
 ; OPTM1:      ret
-
-; ERRORS-NOT: ICE translation error