LibIPC: Remove unnecessary `template<>`

This fixes a Clang warning.

Userland/Libraries/LibIPC/ClientConnection.h

@@ -59,7 +59,6 @@ private:
 
 }
 
-template<>
 template<typename ClientEndpoint, typename ServerEndpoint>
 struct AK::Formatter<IPC::ClientConnection<ClientEndpoint, ServerEndpoint>> : Formatter<Core::Object> {
 };

Userland/Libraries/LibIPC/Connection.h

@@ -267,7 +267,6 @@ protected:
 
 }
 
-template<>
 template<typename LocalEndpoint, typename PeerEndpoint>
 struct AK::Formatter<IPC::Connection<LocalEndpoint, PeerEndpoint>> : Formatter<Core::Object> {
 };