Remove .sequelizerc

After https://github.com/hedgedoc/hedgedoc/pull/969 was merged,
a separate configuration file for the sequelize-cli is no longer
required.

Signed-off-by: David Mehren <git@herrmehren.de>

bin/heroku

@@ -2,18 +2,6 @@
 
 set -e
 
-cat << EOF > .sequelizerc
-var path = require('path');
-
-module.exports = {
-    'config':          path.resolve('config.json'),
-    'migrations-path': path.resolve('lib', 'migrations'),
-    'models-path':     path.resolve('lib', 'models'),
-    'url':             process.env.DATABASE_URL
-}
-
-EOF
-
 cat << EOF > config.json
 
 {