Remove deprecated volume commands from README documentation

This commit updates the README to remove references to the deprecated
commands db-volume-create and db-volume-remove. These commands have been
removed from the Makefile as they are redundant with Docker Compose's
built-in volume management.

Docker Compose automatically creates volumes when containers start and
the env-reset command now handles volume cleanup when needed. This
simplification reduces command duplication and better aligns with
Docker's native workflows.

The README now accurately reflects the available commands in the current
implementation, preventing confusion for users.

Author: nanoninja

README.md

@@ -398,8 +398,6 @@ The Makefile provides many helpful commands:
 | db-dump          | Backup all databases                  |
 | db-restore       | Restore database from backup          |
 | db-connect       | Connect to MySQL shell                |
-| db-volume-create | Create MySQL data volume              |
-| db-volume-remove | Remove MySQL data volume              |
 
 ### Framework Installation