Remove the unused support for jump-table switch statements.

src/ia32/assembler-ia32.cc

Index: src/ia32/assembler-ia32.cc
===================================================================
--- src/ia32/assembler-ia32.cc	(revision 2176)
+++ src/ia32/assembler-ia32.cc	(working copy)
@@ -2182,17 +2182,6 @@
 }
 
 
-void Assembler::WriteInternalReference(int position, const Label& bound_label) {
-  ASSERT(bound_label.is_bound());
-  ASSERT(0 <= position);
-  ASSERT(position + static_cast<int>(sizeof(uint32_t)) <= pc_offset());
-  ASSERT(long_at(position) == 0);  // only initialize once!
-
-  uint32_t label_loc = reinterpret_cast<uint32_t>(addr_at(bound_label.pos()));
-  long_at_put(position, label_loc);
-}
-
-
 #ifdef GENERATED_CODE_COVERAGE
 static FILE* coverage_log = NULL;