Dead code removal

src/detect-engine-port.c

@@ -181,8 +181,6 @@ void DetectPortCleanupList (DetectPort *head) {
         DetectPortFree(cur);
         cur = next;
     }
-
-    head = NULL;
 }
 
 /**

src/source-ipfw.c

@@ -417,8 +417,6 @@ TmEcode ReceiveIPFWThreadDeinit(ThreadVars *tv, void *data)
         SCReturnInt(TM_ECODE_FAILED);
     }
 
-    data = (void *)ptv;
-
     SCReturnInt(TM_ECODE_OK);
 }