Remove connects_to incomplete description from Other config options

It was removed in
305534e
and then reintroduced by mistake when fixing some conflicts. It's
explained in its own section.

Author: rosa

README.md

@@ -226,7 +226,6 @@ There are several settings that control how Solid Queue works that you can set a
 
   **This is not used for errors raised within a job execution**. Errors happening in jobs are handled by Active Job's `retry_on` or `discard_on`, and ultimately will result in [failed jobs](#failed-jobs-and-retries). This is for errors happening within Solid Queue itself.
 
-- `connects_to`: a custom database configuration that will be used in the abstract `SolidQueue::Record` Active Record model. This is required to use a different database than the main app. For example:
 - `use_skip_locked`: whether to use `FOR UPDATE SKIP LOCKED` when performing locking reads. This will be automatically detected in the future, and for now, you'd only need to set this to `false` if your database doesn't support it. For MySQL, that'd be versions < 8, and for PostgreSQL, versions < 9.5. If you use SQLite, this has no effect, as writes are sequential.
 - `process_heartbeat_interval`: the heartbeat interval that all processes will follow—defaults to 60 seconds.
 - `process_alive_threshold`: how long to wait until a process is considered dead after its last heartbeat—defaults to 5 minutes.