Remove some leftovers of full-codegen's generators implementation.

src/assembler.cc

Index: src/assembler.cc
diff --git a/src/assembler.cc b/src/assembler.cc
index a2c0ebebaf96e283485b7e63a3f9b660417092a1..6f6991523dae34bf2c5be5703d5af1cc6557be75 100644
--- a/src/assembler.cc
+++ b/src/assembler.cc
@@ -782,8 +782,6 @@ const char* RelocInfo::RelocModeName(RelocInfo::Mode rmode) {
       return "debug break slot at tail call";
     case CODE_AGE_SEQUENCE:
       return "code age sequence";
-    case GENERATOR_CONTINUATION:
-      return "generator continuation";
     case WASM_MEMORY_REFERENCE:
       return "wasm memory reference";
     case WASM_MEMORY_SIZE_REFERENCE:
@@ -884,7 +882,6 @@ void RelocInfo::Verify(Isolate* isolate) {
     case DEBUG_BREAK_SLOT_AT_RETURN:
     case DEBUG_BREAK_SLOT_AT_CALL:
     case DEBUG_BREAK_SLOT_AT_TAIL_CALL:
-    case GENERATOR_CONTINUATION:
     case WASM_MEMORY_REFERENCE:
     case WASM_MEMORY_SIZE_REFERENCE:
     case WASM_GLOBAL_REFERENCE:
@@ -1914,12 +1911,6 @@ void Assembler::RecordComment(const char* msg) {
 }
 
 
-void Assembler::RecordGeneratorContinuation() {
-  EnsureSpace ensure_space(this);
-  RecordRelocInfo(RelocInfo::GENERATOR_CONTINUATION);
-}
-
-
 void Assembler::RecordDebugBreakSlot(RelocInfo::Mode mode) {
   EnsureSpace ensure_space(this);
   DCHECK(RelocInfo::IsDebugBreakSlot(mode));