I would like to to the delete the current line using
Shift + Delete
I think ctrl-shift-k (in the Text Bundle) does what you're after ...
you can just change the command that runs it to shift-delete if you
Or .. if you don't want to override that bundle, you can select that
macro from the Bundle Editor window and hit that Plus-plus button you
see @ the bottom of the window over there to duplicate it, move it to
your personal bundle and change the activation key to the one you like.