Blender Git Loki

Fix T53309: Remove default 'Clear loc/rot/scale delta transform' shortcuts.

The loc one (shift-alt-G) was same as 'remove selected from active group'
action... Clear delta transform is not a common operation, so we can
live without a default shortcut for it.

Note that using same key (G) in same space for two completely different
kind of operations is probably a rather bad thing, nice topic for future
keymap work. ;)

Probably nice to have in 2.79a.