It contains the examples of WordPress Actions/Filters.
Restrict user to select different currency if already has any Processing order.
Fix the W3Validator Warnings of type attribute in script and style element.
In this example, i have only removed the si-contact-form from the Front Page. This code can be removed the single/multiple plugins from multiple pages/templates.
Change the default template to the custom template for Search.
Add async and defer to javascript file only for Homepage. It can be done on other pages with altering the conidtion.
Change default Editor to text(HTML).
Change Editor to tinymce. These lines can be added in functions.php or in a plugin.
Add HTTP Auth on WordPress except the wp-admin and wp-login page and also it doesn't give the HTTP Auth to the administrators.
Remove Unnecessary Files/Links by using the following actions. These Actions can be used as per your requirements.