Subzero: Delete szdiff.py tests and ERRORS tests.

tests_lit/llvm2ice_tests/phi.ll

Index: tests_lit/llvm2ice_tests/phi.ll
diff --git a/tests_lit/llvm2ice_tests/phi.ll b/tests_lit/llvm2ice_tests/phi.ll
index 3cce6f645ff17247732bae3ee1e2f3b5045eaa1f..0099fed742a4eec70426ed7709df758d48deba6f 100644
--- a/tests_lit/llvm2ice_tests/phi.ll
+++ b/tests_lit/llvm2ice_tests/phi.ll
@@ -7,8 +7,6 @@
 ; RUN: %lc2i -i %s --args -O2 --verbose none --phi-edge-split=0 \
 ; RUN:   | llvm-mc -triple=i686-none-nacl -filetype=obj \
 ; RUN:   | llvm-objdump -d -symbolize -x86-asm-syntax=intel - | FileCheck %s
-; RUN: %lc2i -i %s --args --verbose none | FileCheck --check-prefix=ERRORS %s
-; RUN: %lc2i -i %s --insts | %szdiff %s | FileCheck --check-prefix=DUMP %s
 
 define internal i32 @testPhi1(i32 %arg) {
 entry:
@@ -52,9 +50,6 @@ target:
 ; CHECK: mov [[PHI:.*]], 54321
 ; CHECK: mov {{.*}}, [[PHI]]
 
-; ERRORS-NOT: ICE translation error
-; DUMP-NOT: SZ
-
 ; Test that address mode inference doesn't extend past
 ; multi-definition, non-SSA Phi temporaries.
 define internal i32 @testPhi3(i32 %arg) {