[crankshaft] Delete unused Hydrogen-BCH code

src/crankshaft/arm/lithium-arm.cc

Index: src/crankshaft/arm/lithium-arm.cc
diff --git a/src/crankshaft/arm/lithium-arm.cc b/src/crankshaft/arm/lithium-arm.cc
index 59fbef9ac553d70afd1bfc2bb30f1119a66fb4e0..f94f572a3821ff3bdc5067f7dd2771f94b403e0a 100644
--- a/src/crankshaft/arm/lithium-arm.cc
+++ b/src/crankshaft/arm/lithium-arm.cc
@@ -1825,13 +1825,6 @@ LInstruction* LChunkBuilder::DoBoundsCheck(HBoundsCheck* instr) {
 }
 
 
-LInstruction* LChunkBuilder::DoBoundsCheckBaseIndexInformation(
-    HBoundsCheckBaseIndexInformation* instr) {
-  UNREACHABLE();
-  return NULL;
-}
-
-
 LInstruction* LChunkBuilder::DoAbnormalExit(HAbnormalExit* instr) {
   // The control instruction marking the end of a block that completed
   // abruptly (e.g., threw an exception).  There is nothing specific to do.