build: Drop unused docker compose and sql files.

.github/workflows/docker-compose.yml.mysqldbdump

@@ -1,23 +0,0 @@
-version: '3'
-services:
-  mysql:
-    image: mysql:5.7
-    container_name: edx.devstack.mysql80
-    ports:
-      - '3306:3306'
-    environment:
-      MYSQL_ROOT_PASSWORD: ""
-      MYSQL_ALLOW_EMPTY_PASSWORD: "yes"
-    volumes:
-      - ./init:/docker-entrypoint-initdb.d
-    healthcheck:
-      test: ["CMD", "mysqladmin" ,"ping", "-h", "localhost"]
-      timeout: 20s
-      retries: 10
-  edxapp:
-    image: edxops/edxapp:latest
-    command: bash -c 'source /edx/app/edxapp/edxapp_env && cd /edx/app/edxapp/edx-platform/ && make migrate'
-    volumes:
-       - ../../:/edx/app/edxapp/edx-platform
-    depends_on:
-      - mysql

.github/workflows/init/01.sql

@@ -1,3 +0,0 @@
-CREATE DATABASE IF NOT EXISTS `edxapp`;
-CREATE DATABASE IF NOT EXISTS `edxapp_csmh`;
-GRANT ALL PRIVILEGES ON *.* TO 'edxapp001'@'%' IDENTIFIED BY 'password';