Removed MariaDB refs.

README.md

@@ -118,7 +118,7 @@ If you are not planning to go with Docker or just want to setup a local developm
 - [Python 3.8+](https://www.python.org/)
 - [`pip`](https://pip.pypa.io/en/stable/)
 - [`git`](https://git-scm.com/)
-- [PostgreSQL 13+](https://www.postgresql.org/) or [MariaDB 10+](https://mariadb.org/)
+- [PostgreSQL 13+](https://www.postgresql.org/)
 - [Virtualenv](https://virtualenv.pypa.io/en/latest/) (Optional, development only)
 
 ### Installation
@@ -143,7 +143,7 @@ pip3 install -r requirements.txt
 
 #### Setting up the database
 
-The primary database supported by AURA is PostgreSQL.
+We officially only support PostgreSQL. Setup your database using following scripts:
 
 ```bash
 # Additional Python packages for PostgreSQL
@@ -152,15 +152,6 @@ pip3 install -r contrib/postgresql-requirements.txt
 sudo -u postgres psql -f contrib/postgresql-create-database.sql
 ```
 
-Alternatively you can also use MariaDB:
-
-```bash
-# Additional Python packages for MariaDB
-pip3 install -r contrib/mariadb-requirements.txt
-# Create database and user (change password in script)
-sudo mysql -u root -p < contrib/mariadb-database.sql
-```
-
 You might want to change the password for the database user created by the relevant script.
 
 ### Configuration