Take out wide breakpoint on conferences
Take out wide breakpoint on conferences

refs: CNVS-27362

Test plan:
- Compile css; if successful we're good
- No change in UI

Change-Id: I552ef9053e19548a92f8614b0f98fd97da26c9c0
Reviewed-on: https://gerrit.instructure.com/73983
Tested-by: Jenkins
Reviewed-by: Pam Hiett <7b533437add1ce4ea4ed79979fa88e0e484e554b@instructure.com>
Product-Review: Pam Hiett <7b533437add1ce4ea4ed79979fa88e0e484e554b@instructure.com>
QA-Review: Nathan Rogowski <2e8aa918660411855c6d44d5bb2da677aa033255@instructure.com>

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