Disable Transforming lines until their bugs are fixed

Summary:
Translations on lines are broken, both because onMoveEnd behaves
differently, and because moving one line doesn't move the other
(if you are drawing 2 lines). :(

This commit disables these transformer shape types until I fix
their movement. (Elizabeth suggested translations be specified
by dragging points rather than dragging the polygon to make them
more intentional, and implementing that would probably solve
this and the myriad of other issues that would come up around
dragging multiple and different types of shapes so that's
probably the simplest solution.)

Test Plan: none

Auditors: alex