remove #right-side table.assignments css, it's not used anymore
remove #right-side table.assignments css, it's not used anymore

refs: CNVS-28781

did a global search and we don't have any tables
with class .assignments anywhere. this must be
left over from our pre 2011 era dashboard

test plan:

try to see if you can find anywhere that would
render a table of assignments on the right side
of the page, confirm there isn't or that if there
is, it still looks good.

Change-Id: I4a0560f959fb7742971ceadbedf8b7b0a2034840
Reviewed-on: https://gerrit.instructure.com/77307
Reviewed-by: Simon Williams <088e16a1019277b15d58faf0541e11910eb756f6@instructure.com>
Reviewed-by: Jennifer Stern <7e594e5cba47371ac9ee694a84b9d94f9f6ec815@instructure.com>
Tested-by: Jenkins
QA-Review: Myller de Araujo <e5c7c5e1b7f2ce5e9870cc98ec52b20b3006cb48@instructure.com>
Product-Review: Ryan Shaw <ea3cd978650417470535f3a4725b6b5042a6ab59@instructure.com>

instructure/canvas-lms,instructure/canvas-lms,venturehive/canvas-lms,venturehive/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,roxolan/canvas-lms,SwinburneOnline/canvas-lms,roxolan/canvas-lms,djbender/canvas-lms,fronteerio/canvas-lms,SwinburneOnline/canvas-lms,grahamb/canvas-lms,HotChalk/canvas-lms,grahamb/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,SwinburneOnline/canvas-lms,dgynn/canvas-lms,instructure/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,matematikk-mooc/canvas-lms,matematikk-mooc/canvas-lms,venturehive/canvas-lms,HotChalk/canvas-lms,sfu/canvas-lms,dgynn/canvas-lms,HotChalk/canvas-lms,grahamb/canvas-lms,dgynn/canvas-lms,fronteerio/canvas-lms,fronteerio/canvas-lms,SwinburneOnline/canvas-lms,sfu/canvas-lms,dgynn/canvas-lms,instructure/canvas-lms,roxolan/canvas-lms,djbender/canvas-lms,matematikk-mooc/canvas-lms,grahamb/canvas-lms,fronteerio/canvas-lms,matematikk-mooc/canvas-lms,roxolan/canvas-lms,djbender/canvas-lms,instructure/canvas-lms,grahamb/canvas-lms,venturehive/canvas-lms,HotChalk/canvas-lms,instructure/canvas-lms