Remove an unused function

src/irc/irc_channel.cpp

@@ -53,11 +53,5 @@ std::unique_ptr<IrcUser> IrcChannel::remove_user(const IrcUser* user)
           this->joined = false;
         }
     }
-}
-
-void IrcChannel::remove_all_users()
-{
-  this->users.clear();
-  this->self = nullptr;
   return result;
 }

src/irc/irc_channel.hpp

@@ -32,7 +32,6 @@ public:
   IrcUser* add_user(const std::string& name,
                     const std::map<char, char>& prefix_to_mode);
   IrcUser* find_user(const std::string& name) const;
-  void remove_all_users();
   std::unique_ptr<IrcUser> remove_user(const IrcUser* user);
   const std::vector<std::unique_ptr<IrcUser>>& get_users() const
   { return this->users; }