remove beta conversations message
remove beta conversations message

test plan
- open conversations
- ensure that there isn't a message above the 'no conversations
 selected' message and envelope icon saying something about this
 being a beta feature

Change-Id: Ibd95af1806234cf2d2cc1e844f34266b3a2e2bdd
Reviewed-on: https://gerrit.instructure.com/34853
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
Reviewed-by: Braden Anderson <a6cc2cef7d25f27847876bdb81651755fcebacf0@instructure.com>
QA-Review: Trevor deHaan <85df72112e8a9484fec7b3db2e31789c2c2d4e07@instructure.com>
Product-Review: Joel Hough <4816dabf8db1bc6cac35b3a24cab2ff844b5b0c7@instructure.com>

fronteerio/canvas-lms,sdeleon28/canvas-lms,roxolan/canvas-lms,grahamb/canvas-lms,tgroshon/canvas-lms,tgroshon/canvas-lms,sdeleon28/canvas-lms,sfu/canvas-lms,Jyaasa/canvas-lms,sdeleon28/canvas-lms,SwinburneOnline/canvas-lms,sfu/canvas-lms,usmschuck/canvas,venturehive/canvas-lms,utkarshx/canvas-lms,redconfetti/canvas-lms,djbender/canvas-lms,juoni/canvas-lms,HotChalk/canvas-lms,va7map/canvas-lms,kyroskoh/canvas-lms,samuels410/greatlakes-lms,antoniuslin/canvas-lms,samuels410/greatlakes-lms,skmezanul/canvas-lms,utkarshx/canvas-lms,greyhwndz/canvas-lms,skmezanul/canvas-lms,Jyaasa/canvas-lms,kyroskoh/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,tgroshon/canvas-lms,whalejasmine/canvas-lms,shidao-fm/canvas-lms,grahamb/canvas-lms,roxolan/canvas-lms,juoni/canvas-lms,va7map/canvas-lms,Unow/canvas-lms,redconfetti/canvas-lms,SwinburneOnline/canvas-lms,sfu/canvas-lms,usmschuck/canvas,kyroskoh/canvas-lms,shidao-fm/canvas-lms,grahamb/canvas-lms,Rvor/canvas-lms,efrj/canvas-lms,wrdsb/canvas-lms,utkarshx/canvas-lms,redconfetti/canvas-lms,jay3126/canvas-lms,efrj/canvas-lms,skmezanul/canvas-lms,redconfetti/canvas-lms,juoni/canvas-lms,antoniuslin/canvas-lms,skmezanul/canvas-lms,fronteerio/canvas-lms,usmschuck/canvas,samuels410/greatlakes-lms,ShreniiNepal/shrenii_lmp,efrj/canvas-lms,HotChalk/canvas-lms,wrdsb/canvas-lms,ShreniiNepal/shrenii_lmp,fronteerio/canvas-lms,antoniuslin/canvas-lms,jay3126/canvas-lms,Rvor/canvas-lms,antoniuslin/canvas-lms,djbender/canvas-lms,samuels410/greatlakes-lms,roxolan/canvas-lms,venturehive/canvas-lms,efrj/canvas-lms,Unow/canvas-lms,shidao-fm/canvas-lms,Jyaasa/canvas-lms,fronteerio/canvas-lms,kyroskoh/canvas-lms,whalejasmine/canvas-lms,leftplusrightllc/canvas-lms,HotChalk/canvas-lms,wye0220/shindig-canvas,wrdsb/canvas-lms,juoni/canvas-lms,Rvor/canvas-lms,whalejasmine/canvas-lms,SwinburneOnline/canvas-lms,sfu/canvas-lms,greyhwndz/canvas-lms,wrdsb/canvas-lms,SwinburneOnline/canvas-lms,jay3126/canvas-lms,Jyaasa/canvas-lms,whalejasmine/canvas-lms,grahamb/canvas-lms,greyhwndz/canvas-lms,jay3126/canvas-lms,va7map/canvas-lms,Rvor/canvas-lms,leftplusrightllc/canvas-lms,djbender/canvas-lms,tgroshon/canvas-lms,sdeleon28/canvas-lms,HotChalk/canvas-lms,venturehive/canvas-lms,leftplusrightllc/canvas-lms,ShreniiNepal/shrenii_lmp,grahamb/canvas-lms,wye0220/shindig-canvas,Unow/canvas-lms,sfu/canvas-lms,venturehive/canvas-lms,leftplusrightllc/canvas-lms,roxolan/canvas-lms,shidao-fm/canvas-lms,usmschuck/canvas,va7map/canvas-lms,ShreniiNepal/shrenii_lmp,greyhwndz/canvas-lms,utkarshx/canvas-lms,sfu/canvas-lms,wye0220/shindig-canvas