Drop reference counter for struct sshfs_file

Variables of this kind are created in sshfs_open_common() and freed
in sshfs_release(). Since sshfs_release() calls sshfs_flush(), there
can be no pending write requests before at the time of freeing, so
there is no need for reference counting.

sshfs.c

@@ -204,7 +204,6 @@ struct sshfs_file {
  int is_seq;
  int connver;
  int modifver;
- int refs;
 };
 
 struct sshfs {
@@ -2547,7 +2546,6 @@ static int sshfs_open_common(const char *path, mode_t mode,
  pthread_cond_init(&sf->write_finished, NULL);
  /* Assume random read after open */
  sf->is_seq = 0;
- sf->refs = 1;
  sf->next_pos = 0;
  pthread_mutex_lock(&sshfs.lock);
  sf->modifver= sshfs.modifver;
@@ -2649,18 +2647,6 @@ static int sshfs_fsync(const char *path, int isdatasync,
  return err;
 }
 
-static void sshfs_file_put(struct sshfs_file *sf)
-{
- sf->refs--;
- if (!sf->refs)
- g_free(sf);
-}
-
-static void sshfs_file_get(struct sshfs_file *sf)
-{
- sf->refs++;
-}
-
 static int sshfs_release(const char *path, struct fuse_file_info *fi)
 {
  struct sshfs_file *sf = get_sshfs_file(fi);
@@ -2671,7 +2657,7 @@ static int sshfs_release(const char *path, struct fuse_file_info *fi)
  }
  buf_free(handle);
  chunk_put_locked(sf->readahead);
- sshfs_file_put(sf);
+ g_free(sf);
  return 0;
 }
 
@@ -2925,8 +2911,6 @@ static int sshfs_read(const char *path, char *rbuf, size_t size, off_t offset,
 static void sshfs_write_begin(struct request *req)
 {
  struct sshfs_file *sf = (struct sshfs_file *) req->data;
-
- sshfs_file_get(sf);
  list_add(&req->list, &sf->write_reqs);
 }
 
@@ -2947,7 +2931,6 @@ static void sshfs_write_end(struct request *req)
  }
  list_del(&req->list);
  pthread_cond_broadcast(&sf->write_finished);
- sshfs_file_put(sf);
 }
 
 static int sshfs_async_write(struct sshfs_file *sf, const char *wbuf,