Removed the uneeded break all tag in sass file

The assignment title had some issues with word wrapping.  If
a word was bigger than 90 characters then it would run off screen
we fixed by adding a break all to the css, but it was unneeded
because the normal format already covered this.

fixes CNVS-14579

test plan:
-Create an assignment.
-Enter in multiple words into title see that title wraps.

Change-Id: Iad657bbc2c72c8e807c2ba4c0a4ee8decca40347
Reviewed-on: https://gerrit.instructure.com/44390
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Matt Berns <mberns@instructure.com>
QA-Review: Sean Lewis <slewis@instructure.com>
Reviewed-by: Simon Williams <simon@instructure.com>
Product-Review: Hilary Scharton <hilary@instructure.com>