Many of the functions declared in functions.php check to see if they have been declared, but many do not. In a future release, could you please include this (simple) functionality?
My specific example is that I use an SEO plugin to generate the page title, and the boilerplate_filter_wp_title always interferes. I've tried having the remove filter function in my child functions.php...but it doesn't work (specific code below).
I have to modify the Parent Theme with each update so that my own function declaration can override the functionality you built.