Fix: Compile error with Ghost X11 off and Wayland on

‘const’ qualifiers cannot be applied to ‘const std::runtime_error&’

intern/ghost/intern/GHOST_ISystem.cc

@@ -105,7 +105,7 @@ GHOST_TSuccess GHOST_ISystem::createSystem(bool verbose, [[maybe_unused]] bool b
       try {
         m_system = new GHOST_SystemWayland(background);
       }
-      catch (const std::runtime_error &const e) {
+      catch (const std::runtime_error &e) {
         if (verbose) {
           fprintf(stderr, "GHOST: %s\n", e.what());
         }