remove 2 more BBB props on send_request
remove 2 more BBB props on send_request

flag=none
fixes VICE-3147

test plan:
- create and start a BBB conf with old modal
- verify that in BBB lock options,
See other viewer's webcams is ON

Change-Id: I83ad4560addd5b66c1868f6edd0c9d73d127dbd1
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/301142
Reviewed-by: Jason Gillett <12d37bea14b8257b31fd2f970455158adbd46adb@instructure.com>
QA-Review: Jason Gillett <12d37bea14b8257b31fd2f970455158adbd46adb@instructure.com>
Product-Review: Jason Gillett <12d37bea14b8257b31fd2f970455158adbd46adb@instructure.com>
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>

sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms