Remove unused dependency and simple feature, update dependencies and fix some clippy lints

src/db/models/organization.rs

@@ -34,7 +34,7 @@ pub enum UserOrgStatus {
 }
 
 #[derive(Copy, Clone, PartialEq, Eq)]
-#[derive(FromPrimitive)]
+#[derive(num_derive::FromPrimitive)]
 pub enum UserOrgType {
     Owner = 0,
     Admin = 1,
@@ -198,7 +198,6 @@ impl UserOrganization {
 
 use crate::db::schema::{ciphers_collections, organizations, users_collections, users_organizations};
 use crate::db::DbConn;
-use diesel;
 use diesel::prelude::*;
 
 use crate::api::EmptyResult;