proto: Remove GetPrivateUserInfo message (#36265)

This PR removes the `GetPrivateUserInfo` RPC message.

We're no longer using the message after
https://github.com/zed-industries/zed/pull/36255.

Release Notes:

- N/A

crates/collab/src/rpc.rs

@@ -462,7 +462,6 @@ impl Server {
             .add_request_handler(follow)
             .add_message_handler(unfollow)
             .add_message_handler(update_followers)
-            .add_request_handler(get_private_user_info)
             .add_request_handler(accept_terms_of_service)
             .add_message_handler(acknowledge_channel_message)
             .add_message_handler(acknowledge_buffer_version)
@@ -4209,30 +4208,6 @@ async fn mark_notification_as_read(
     Ok(())
 }
 
-/// Get the current users information
-async fn get_private_user_info(
-    _request: proto::GetPrivateUserInfo,
-    response: Response<proto::GetPrivateUserInfo>,
-    session: MessageContext,
-) -> Result<()> {
-    let db = session.db().await;
-
-    let metrics_id = db.get_user_metrics_id(session.user_id()).await?;
-    let user = db
-        .get_user_by_id(session.user_id())
-        .await?
-        .context("user not found")?;
-    let flags = db.get_user_flags(session.user_id()).await?;
-
-    response.send(proto::GetPrivateUserInfoResponse {
-        metrics_id,
-        staff: user.admin,
-        flags,
-        accepted_tos_at: user.accepted_tos_at.map(|t| t.and_utc().timestamp() as u64),
-    })?;
-    Ok(())
-}
-
 /// Accept the terms of service (tos) on behalf of the current user
 async fn accept_terms_of_service(
     _request: proto::AcceptTermsOfService,