removing core build

Author: nvarscar

appveyor.yml

@@ -53,12 +53,6 @@ for:
       - mssql
       - mysql
       - postgresql
-    before_build:
-      - ps: .\build\build_prep.ps1
-    build_script:
-      - ps: .\build\build.ps1 -Script .\build.cake
-    after_build:
-      - ps: .\build\copy_build_files.ps1
     before_test:
       - sudo -u postgres psql -c "CREATE USER sa WITH SUPERUSER PASSWORD 'Password12!';"
       - ps: .\tests\appveyor.prep.ps1