Remove deprecated --incremental-code-compaction flag.

src/heap/mark-compact.cc

Index: src/heap/mark-compact.cc
diff --git a/src/heap/mark-compact.cc b/src/heap/mark-compact.cc
index e4f2040c6f1d3362b9b127b2e2f01002d12e97c3..dee8d9319fc03c5c5cbae6e008cdd1efb3d8d835 100644
--- a/src/heap/mark-compact.cc
+++ b/src/heap/mark-compact.cc
@@ -260,8 +260,7 @@ bool MarkCompactCollector::StartCompaction(CompactionMode mode) {
 
     CollectEvacuationCandidates(heap()->old_space());
 
-    if (FLAG_compact_code_space && (mode == NON_INCREMENTAL_COMPACTION ||
-                                    FLAG_incremental_code_compaction)) {
+    if (FLAG_compact_code_space) {
       CollectEvacuationCandidates(heap()->code_space());
     } else if (FLAG_trace_fragmentation) {
       TraceFragmentation(heap()->code_space());