clean up gallery after team21 cev merge.
clean up gallery after team21 cev merge.

USCDataScience/polar.usc.edu,USCDataScience/polar.usc.edu,USCDataScience/polar.usc.edu,USCDataScience/polar.usc.edu,USCDataScience/polar.usc.edu,USCDataScience/polar.usc.edu,USCDataScience/polar.usc.edu