How do I disable all pre-existing yasnippet snippets? I only want to use ones that I define myself.
Customize the value of
yas-snippet-dirs so that it doesn't include the default snippet directory. On recent yasnippet versions this will be the symbol
yas-snippet-dirs is a variable defined in `yasnippet.el'. Its value is ("~/.emacs.d/snippets" yas-installed-snippets-dir) Documentation: List of top-level snippet directories. Each element, a string or a symbol whose value is a string, designates a top-level directory where per-mode snippet directories can be found. Elements appearing earlier in the list override later elements' snippets. The first directory is taken as the default for storing snippet's created with `yas-new-snippet'. You can customize this variable.