Remove unreachable code from the code generator.

runtime/vm/intermediate_language_mips.cc

Index: runtime/vm/intermediate_language_mips.cc
===================================================================
--- runtime/vm/intermediate_language_mips.cc	(revision 35738)
+++ runtime/vm/intermediate_language_mips.cc	(working copy)
@@ -4202,13 +4202,6 @@
   Location index_loc = locs()->in(kIndexPos);
 
   if (length_loc.IsConstant() && index_loc.IsConstant()) {
-    // TODO(srdjan): remove this code once failures are fixed.
-    if ((Smi::Cast(length_loc.constant()).Value() >
-         Smi::Cast(index_loc.constant()).Value()) &&
-        (Smi::Cast(index_loc.constant()).Value() >= 0)) {
-      // This CheckArrayBoundInstr should have been eliminated.
-      return;
-    }
     ASSERT((Smi::Cast(length_loc.constant()).Value() <=
             Smi::Cast(index_loc.constant()).Value()) ||
            (Smi::Cast(index_loc.constant()).Value() < 0));