Remove missing links and fmt

Author: hyp3rflow

docs/introduction/index.md

@@ -22,25 +22,23 @@ directory.
   - `protoc` has native binary dependencies, but `pb` command is written in pure
     TypeScript, so it can be used comfortably in Node.js projects, etc., and can
     even easily be run in a web browser.
-  - [How to install and how to use](./cli/pb/README.md)
 - `pollapo` - A package manager for the protobuf schema.
   - A GitHub repository of `.proto` files is treated as a single pollapo
     package.
-  - [How to install and how to use](./cli/pollapo/docs/en/getting-started.md)
 
 ### Browser Extension
 
-  - pbkit-devtools
-    - <img width=300 src="https://user-images.githubusercontent.com/690661/161203806-a6d8a864-8693-4744-8f4a-51407f4aa6e7.png" />
-    - [repo](https://github.com/pbkit/pbkit-devtools)
-    - [chrome web store](https://chrome.google.com/webstore/detail/pbkit-devtools/fjacmiijeihblfhobghceofniolonhca)
+- pbkit-devtools
+  - <img width=300 src="https://user-images.githubusercontent.com/690661/161203806-a6d8a864-8693-4744-8f4a-51407f4aa6e7.png" />
+  - [repo](https://github.com/pbkit/pbkit-devtools)
+  - [chrome web store](https://chrome.google.com/webstore/detail/pbkit-devtools/fjacmiijeihblfhobghceofniolonhca)
 
 ### Editor Extension
 
-  - vscode-pbkit
-    - Syntax highlight, Go to definition for VSCode.
-    - [repo](https://github.com/pbkit/vscode-pbkit)
-    - [Visual Studio Marketplace](https://marketplace.visualstudio.com/items?itemName=pbkit.vscode-pbkit)
+- vscode-pbkit
+  - Syntax highlight, Go to definition for VSCode.
+  - [repo](https://github.com/pbkit/vscode-pbkit)
+  - [Visual Studio Marketplace](https://marketplace.visualstudio.com/items?itemName=pbkit.vscode-pbkit)
 
 ### Library
 
@@ -78,6 +76,3 @@ directory.
 
 pbkit is dual-licensed under Apache 2.0 and MIT terms.\
 see [LICENSE-APACHE][LICENSE-APACHE] and [LICENSE-MIT][LICENSE-MIT] for details.
-
-[LICENSE-APACHE]: ./LICENSE-APACHE
-[LICENSE-MIT]: ./LICENSE-MIT