Remove former members

Removed Nitin Gupta and Jessica Polka from members list.

Author: stephaniewankowicz

_data/members.yml

@@ -16,8 +16,6 @@
   - name: James Fraser, Ph.D.
     title: Professor - UCSF, Bioengineering
     photo: /assets/images/members/Fraser.jpg
-  - name: Nitin Gupta
-    title: Head of Product
     photo: /assets/images/members/gupta.jpg
   - name: James Holton, Ph.D.
     title: Beamline Scientist - Lawrence Berkeley National Lab, Full Adjunct Professor - UCSF
@@ -28,8 +26,6 @@
   - name: Steve Meisburger, Ph.D.
     title: Staff Scientist - CHESS (Cornell High Energy Synchotron Source)
     photo: /assets/images/members/meisburger.jpg
-  - name: Jessica Polka, Ph.D.
-    title: Director of Open Science
     photo: /assets/images/members/polka.jpg
   - name: Michael Wall, Ph.D.
     title: Senior Scientist - Los Alamos National Laboratory