Since modules_unittests already depends on
remote_bitrate_estimator:bwe_simulator and the bwe_simulations.cc
source was added to that target in https://codereview.webrtc.org/2296253002
there's no point having it added here.
BUG=webrtc:6323
NOTRY=True
NOPRESUBMIT=True
NOTREECHECKS=True
Review-Url: https://codereview.webrtc.org/2368933002
Cr-Commit-Position: refs/heads/master@{#14380}