You probably don’t want to do this, since auto-saving is useful, especially when Emacs or your computer crashes while you are editing a document.
Instead, you might want to change the variable
auto-save-interval, which specifies how many keystrokes Emacs
waits before auto-saving. Increasing this value forces Emacs to wait
longer between auto-saves, which might annoy you less.
You might also want to look into Sebastian Kremer’s
package (see Where can I get Emacs Lisp packages that don’t come with Emacs?). This
package also allows you to place all auto-save files in one directory,
such as /tmp.
To disable or change how
see Auto Save in The GNU Emacs Manual.