feat(live): remove live mode

Author: hiroppy

.gitignore

@@ -2,6 +2,5 @@ node_modules
 dist
 coverage
 lerna-debug.log
-.env
 *.pdf
 .eslintcache

README.md

@@ -43,8 +43,6 @@
   - Deploying to GitHub Pages
 - PDF Mode
   - Exporting slides as PDF
-- [Live Mode](#live-mode)
-  - Available to make a speech while streaming a comment on Twitter
 
 ## Demos
 
@@ -72,7 +70,6 @@ $ npx fusuma start-prod    # run server for bundle directory
 $ npx fusuma build         # build slides for production
 $ npx fusuma deploy        # deploy to github pages
 $ npx fusuma pdf           # export as PDF
-$ npx fusuma live          # start live mode
 ```
 
 When `npx fusuma start` is executed, fusuma will create slides like follows on `http://localhost:8080`. In addition, Fusuma adds a sidebar and when you set section titles, fusuma shows them on the sidebar.
@@ -192,17 +189,6 @@ You can see your Note for each slide and the next slide on the Host screen.
 | :-------------------------------------------------: | :---------------------------------: |
 | ![](./site/docs/assets/presenter-mode-timeline.png) | ![](./site/docs/assets/drawing.png) |
 
-## Live Mode
-
-Fusuma can fetch tweets from Twitter. In addition, fusuma have an api endpoint.  
-If you specify a `keyword` and `authentication keys`, fetching from twitter will be enabled.  
-Since comments can be sent to fusuma itself, you can use in the private case.  
-Also, this mode can run with Presenter Mode.
-
-<img src="./site/docs/assets/live-mode-comments.png" width="600px">
-
-👉 [Modes/Live](https://hiroppy.github.io/fusuma/docs/modes/live)
-
 ## Lighthouse
 
 > [Lighthouse](https://developers.google.com/web/tools/lighthouse) is an open-source, automated tool for improving the quality of web pages. You can run it against any web page, public or requiring authentication. It has audits for performance, accessibility, progressive web apps, SEO and more.