Rm duplicated docs (#423)

* Rm duplicated docs

* Delete query-plan-analysis.md

Author: staabm

README.md

@@ -104,7 +104,6 @@ includes:
 
 - [Runtime configuration](https://github.com/staabm/phpstan-dba/blob/main/docs/configuration.md)
 - [Record and Replay](https://github.com/staabm/phpstan-dba/blob/main/docs/record-and-replay.md)
-- [Query Plan Analysis](https://github.com/staabm/phpstan-dba/blob/main/docs/query-plan-analysis.md)
 - [Custom Query APIs Support](https://github.com/staabm/phpstan-dba/blob/main/docs/rules.md)
 - [MySQL Support](https://github.com/staabm/phpstan-dba/blob/main/docs/mysql.md)
 - [PGSQL Support](https://github.com/staabm/phpstan-dba/blob/main/docs/pgsql.md)