netmap: don't check for offloading twice

src/source-netmap.c

@@ -753,11 +753,6 @@ static TmEcode ReceiveNetmapThreadInit(ThreadVars *tv, void *initdata, void **da
         }
     }
 
-    if (GetIfaceOffloading(aconf->iface) == 1) {
-        SCLogWarning(SC_ERR_NETMAP_CREATE,
-                     "Using netmap mode with GRO or LRO activated can lead to capture problems");
-    }
-
     *data = (void *)ntv;
     aconf->DerefFunc(aconf);
     SCReturnInt(TM_ECODE_OK);