Not sure if this is still relevant, but you can easily remove the email address field without having to remove the entire page. This can be accomplished by editing the BuddyPress template files you copied into your WordPress theme (wp-content/themes/mytheme/buddypress).
The file you will want to edit is named general.php and is located in “wp-content/themes/mytheme/buddypress/members/single/settings”. Once you locate general.php, simply delete the following code located around line 27 and 28.