Eliminate duplicate code and logs

Author: ZhangHanDong

src/shared/mentionable_text_input.rs

@@ -411,9 +411,9 @@ impl MentionableTextInput {
                 cursor_pos
             ).to_lowercase();
 
-            let current_members_count = self.room_id.as_ref()
-                .and_then(|id| self.room_members_map.get(id))
-                .map_or(0, |members| members.len());
+            // let current_members_count = self.room_id.as_ref()
+            //     .and_then(|id| self.room_members_map.get(id))
+            //     .map_or(0, |members| members.len());
 
             self.update_user_list(cx, &search_text);
             self.cmd_text_input.view(id!(popup)).set_visible(cx, true);