Remove TIMEOUT_GIVES_CONTROL feature

[dominikatrojanowska]

There is a parameter named: TIMEOUT_GIVES_CONTROL which, if enabled, triggers a timeout (30 seconds) after the control request and. If there has been no deny signal in the meantime, the request is accepted automatically. In the current version of MXCuBE, this feature is disabled by default.

The parameter is set here: https://github.com/mxcube/mxcubeweb/blob/develop/mxcubeweb/app.py#L277
and there is some state and actions related on the frontend: https://github.com/mxcube/mxcubeweb/blob/develop/ui/src/reducers/remoteAccess.js

As discussed: mxcube/mxcubecore#1115 (comment) this feature is going to be removed.

After removal update relevant docs (at least User-based login details.md)