In a brand new install of VSCode with no extensions, if you execute Snippets: Fill File with Snippet from the command palette on a new blank document it will provide the following menu options for HTML / JS / JSX / etc file templates (snippets):

As far as I am aware it is not possible to disable / remove these suggestions. This is a request to provide an option to disable these built-in file template snippets. It is also currently impossible AFAIK to re-organize this list, meaning that user created snippets could be several items down as it seems to be sorted by language name.