Remove duplicated disclaimers

Author: sokoliva

docs/migrations/v0_3_to_v1_0/database/README.md

@@ -21,15 +21,4 @@ The v1.0 database migration involves:
 1.  **Schema Updates**: Adding `protocol_version`, `owner`, and `last_updated` columns to the `tasks` and `push_notification_configs` tables.
 2.  **Storage Model**: Transitioning from Pydantic-based JSON to Protobuf-based JSON serialization for better interoperability and performance.
 
-### Rollback & Safety
-> [!IMPORTANT]
-> 
-> **Data Backup**: Always perform a full snapshot of your database before starting the migration.
-> **Rollback**: To revert the schema, use `uv run a2a-db downgrade -1`. 
-
-### Verification
-To verify the migration was successful:
-- Tables should be updated with new columns: owner, protocol_version, last_updated.
-- Inspect the `protocol_version` column in the `tasks` table; entries created before the migration should have `protocol_version` set to `NULL`, entries created during the migration should have `protocol_version` set to `0.3` (if using the zero-downtime migration strategy) and entries created after the migration should have `protocol_version` set to `1.0`.
-
 ---