DBAL-1094: #758 Cleanup travis database creation

[doctrinebot]

Jira issue originally created by user @doctrinebot:

This issue is created automatically through a Github pull request on behalf of deeky666:

Url: #758

Message:

Remove database creation from Travis build script because it is actually done by DBAL test suite already. Moreover it avoids creating temp databases which are useless and not even used by PostgreSQL currently.

[doctrinebot]

Comment created by @doctrinebot:

A related Github Pull-Request [GH-758] was assigned:
#758

[doctrinebot]

Comment created by @doctrinebot:

A related Github Pull-Request [GH-758] was closed:
#758

[doctrinebot]

Issue was closed with resolution "Fixed"

[github-actions]

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