remove inert function call

See:
<https://webkitgtk.org/reference/webkit2gtk/stable/method.WebContext.set_process_model.html>

rose.c

@@ -168,9 +168,6 @@ WebKitWebView* create_new_webview()
     webkit_cookie_manager_set_accept_policy(cookiemanager,
         WEBKIT_COOKIE_POLICY_ACCEPT_ALWAYS);
 
-    webkit_web_context_set_process_model(
-        web_context, WEBKIT_PROCESS_MODEL_MULTIPLE_SECONDARY_PROCESSES);
-
     if (g_file_get_contents("~/.config/rose/style.css", &style, NULL, NULL))
         webkit_user_content_manager_add_style_sheet(
             contentmanager, webkit_user_style_sheet_new(style, WEBKIT_USER_CONTENT_INJECT_ALL_FRAMES, WEBKIT_USER_STYLE_LEVEL_USER, NULL, NULL));