[#2462] fix(doc) Remove 'allow_pushdown_into_connectors=false' in tri…

…no-connector/requirements doc (#2464)

### What changes were proposed in this pull request?

The requirements document for the Trino connector need to remove the
limitation that disabled the 'allow_pushdown_into_connectors'
configuration

### Why are the changes needed?

Fix: #2462

### Does this PR introduce _any_ user-facing change?

NO

### How was this patch tested?

NO

Co-authored-by: Yuhui <hui@datastrato.com>

docs/trino-connector/requirements.md

@@ -14,5 +14,3 @@ To install and deploy the Gravitino connector, The following environmental setup
 - Ensure that all nodes running Trino can access the real catalogs resources, such as Hive, Iceberg, MySQL, PostgreSQL, etc.
 - Ensure that you have installed the following connectors in Trino: Hive, Iceberg, MySQL, PostgreSQL.
 - Ensure that you have set the `catalog.management` to `static` in the Trino configuration.
-- Ensure that you have set the `allow_pushdown_into_connectors` to `false` in the Trino session configuration.
-