rm kristen from team page (#64)

Author: adamjonas

_data/team.yml

@@ -31,11 +31,6 @@
   description: Russ has done a lot of work to help separate Bitcoin Core's node, wallet and GUI components. His work to introduce well-defined <a href="https://github.com/bitcoin/bitcoin/pull/10973" target="_blank" rel="noopener">node-wallet</a> and <a href="https://github.com/bitcoin/bitcoin/pull/10244" target="_blank" rel="noopener">node-GUI</a> has been merged to the project, and he continues to work on a long-term goal to <a href="https://github.com/bitcoin/bitcoin/pull/10102" target="_blank" rel="noopener">run the components in different processes</a>. Russ previously worked on web search at Google and set-top video software at Videon Central, Inc.
   image: assets/images/Russ.jpeg
   alt: Picture of Russ Yanofsky
-- name: Kristen Coelho
-  title: Head of Operations
-  description: Leveraging her background in education and program management, Kristen is dedicated to supporting and optimizing Chaincode's educational initiatives and operational capacity. She's deeply passionate about designing and nurturing inclusive environments and experiences where learning and creativity can thrive. Kristen previously worked in the edtech industry, and is keenly expanding her knowledge of Bitcoin and related technologies.
-  image: assets/images/kristen.jpg
-  alt: Picture of Kristen Coelho
 - name: Sergei Tikhomirov
   title: Postdoctoral Researcher
   description: Sergei is researching the security and privacy of Bitcoin with a focus on the Lightning Network (i.e., <a href="https://eprint.iacr.org/2021/384" target="_blank" rel="noopener">channel balance probing</a>). He holds a <a href="https://hdl.handle.net/10993/44424" target="_blank" rel="noopener">PhD in computer science</a> from the University of Luxembourg, where he explored P2P-based attacks on Bitcoin. Sergei co-hosts a deeply technical <a href="https://basicblockradio.com/" target="_blank" rel="noopener">Russian-language podcast</a> discussing ideas from the broader blockchain space.