Removes application registered with @name from the list of applications
that have registered a bookmark for @uri inside @bookmark.
In the event the URI cannot be found, %FALSE is returned and
@error is set to #G_BOOKMARK_FILE_ERROR_URI_NOT_FOUND.
In the event that no application with name @app_name has registered
a bookmark for @uri, %FALSE is returned and error is set to
#G_BOOKMARK_FILE_ERROR_APP_NOT_REGISTERED.
Removes application registered with @name from the list of applications that have registered a bookmark for @uri inside @bookmark.
In the event the URI cannot be found, %FALSE is returned and @error is set to #G_BOOKMARK_FILE_ERROR_URI_NOT_FOUND. In the event that no application with name @app_name has registered a bookmark for @uri, %FALSE is returned and error is set to #G_BOOKMARK_FILE_ERROR_APP_NOT_REGISTERED.