Remove / overwrite some functions in buddypress.js

Usually it is bp-legacy-js.

But if you place a buddypress.js in wp-content/themes/your-theme/buddypress/js/ this file will be taken instead. The handle will be bp-parent-js

The same goes for CSS files, if you place them in /your-theme/buddypress/css/.

If you place the buddypress.js in a childtheme, the handle will be bp-child-js.