Revert "feat: add online speaker images and names (#409)"

This reverts commit 6cbab41.

config/speakers.json

@@ -1,4 +1,3 @@
-
 [
  {
  "location": "",
@@ -171,46 +170,7 @@
  {
  "city": "Online",
  "location": "Online Edition",
- "lists": [ {
- "name": "Hari Krishnan",
- "title": "Co-founder, CTO at Specmatic",
- "img": "img/online-conf-images/HariKrishanan.webp"
- },
- {
- "name": "Yuan Yuan",
- "title": "Software Engineer",
- "img": "img/online-conf-images/YuanYuan.webp"
- },
- {
- "name": "Ivan Garcia Sainz-Aja",
- "title": "Java Architect",
- "img": "img/online-conf-images/IvanGarciaSainz-Aja.webp"
- },
- {
- "name": "Atinuke Oluwabamikemi Kayode",
- "title": "Community Marketing Specialist at AsyncAPI Initiative",
- "img": "img/online-conf-images/AtinukeOluwabamikemiKayode.webp"
- },
- {
- "name": "Aishat Muibudeen",
- "title": "Product Designer and UX Researcher",
- "img": "img/online-conf-images/AISHAT(Maya)MUIBUDEEN.webp"
- }, 
- {
- "name": "Thulisile Sibanda",
- "title": "Community Manager at AsyncAPI Initiative",
- "img": "img/online-conf-images/VThulisileSibanda.webp"
- },
- {
- "name": "Ankit Dash",
- "title": "Full Stack Developer",
- "img": "img/online-conf-images/AnkitDash.webp"
- },
- {
- "name": "Giri Venkatesan",
- "title": "Principal Developer Advocate and Architect at Solace",
- "img": "img/online-conf-images/GiriVenkatesan.webp"
- }],
+ "lists": [],
  "agenda": null
  }
 ]