Uninstall of the module

The following function can be added to the file project_issue.install to allow the uninstall of the module :

function project_issue_uninstall() {

// Drop database table
db_query('DROP TABLE {project_issue_projects}');
db_query('DROP TABLE {project_issues}');
db_query('DROP TABLE {project_comments}');
db_query('DROP TABLE {project_subscriptions}');
db_query('DROP TABLE {project_issue_state}');

// Delete variables

}

Without this, the tables are not deleted when the module is uninstalled.