[debugger] remove debugger statement support from FCG/CS.

src/assembler.cc

Index: src/assembler.cc
diff --git a/src/assembler.cc b/src/assembler.cc
index 670251cdcee2e847108986c537da442f497187e6..13dc8860280fddb1fbd1b946cab8c80909885676 100644
--- a/src/assembler.cc
+++ b/src/assembler.cc
@@ -723,8 +723,6 @@ const char* RelocInfo::RelocModeName(RelocInfo::Mode rmode) {
       return "no reloc 64";
     case EMBEDDED_OBJECT:
       return "embedded object";
-    case DEBUGGER_STATEMENT:
-      return "debugger statement";
     case CODE_TARGET:
       return "code target";
     case CODE_TARGET_WITH_ID:
@@ -830,7 +828,6 @@ void RelocInfo::Verify(Isolate* isolate) {
     case CELL:
       Object::VerifyPointer(target_cell());
       break;
-    case DEBUGGER_STATEMENT:
     case CODE_TARGET_WITH_ID:
     case CODE_TARGET: {
       // convert inline target address to code object