debugfs_remove — removes a file or directory from the debugfs filesystem
| void debugfs_remove ( | struct dentry * dentry ); | 
dentrya pointer to a the dentry of the file or directory to be removed. If this parameter is NULL or an error value, nothing will be done.
   This function removes a file or directory in debugfs that was previously
   created with a call to another debugfs function (like
   debugfs_create_file or variants thereof.)
   
This function is required to be called in order for the file to be removed, no automatic cleanup of files will happen when a module is removed, you are responsible here.