[crankshaft] Delete unused Hydrogen-BCH code

src/crankshaft/ppc/lithium-ppc.cc

Index: src/crankshaft/ppc/lithium-ppc.cc
diff --git a/src/crankshaft/ppc/lithium-ppc.cc b/src/crankshaft/ppc/lithium-ppc.cc
index 93cdc8450db597bbb2bfcbd4c287448f71736531..e896fbf20947a6f2cf281849ff564ff61ed274e3 100644
--- a/src/crankshaft/ppc/lithium-ppc.cc
+++ b/src/crankshaft/ppc/lithium-ppc.cc
@@ -1764,13 +1764,6 @@ 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.