files: remove FILE_USE_TRACKID flag

Once it was optional but as it no longer is it is no longer useful.

Remove it.

src/util-file.c

@@ -872,7 +872,6 @@ int FileOpenFileWithId(FileContainer *ffc, const StreamingBufferConfig *sbcfg,
         return -1;
 
     ff->file_track_id = track_id;
-    ff->flags |= FILE_USE_TRACKID;
     return 0;
 }
 

src/util-file.h

@@ -47,7 +47,6 @@
 #define FILE_STORED     BIT_U16(11)
 #define FILE_NOTRACK    BIT_U16(12) /**< track size of file */
 #define FILE_USE_DETECT BIT_U16(13) /**< use content_inspected tracker */
-#define FILE_USE_TRACKID    BIT_U16(14) /**< File::file_track_id field is in use */
 #define FILE_HAS_GAPS   BIT_U16(15)
 
 typedef enum FileState_ {
@@ -67,8 +66,7 @@ typedef struct File_ {
     FileState state;
     StreamingBuffer *sb;
     uint64_t txid;                  /**< tx this file is part of */
-    uint32_t file_track_id;         /**< id used by protocol parser. Optional
+    uint32_t file_track_id;         /**< id used by protocol parser */
-                                     *   only used if FILE_USE_TRACKID flag set */
     uint32_t file_store_id;         /**< id used in store file name file.<id> */
     int fd;                         /**< file descriptor for filestore, not
                                         open if equal to -1 */