cjson/sqlite README: remove install from source

c/cjson/README.md

@@ -1,31 +1,19 @@
 LLGo wrapper of DaveGamble/cJSON
 =====
-[![Build Status](https://github.com/goplus/cjson/actions/workflows/go.yml/badge.svg)](https://github.com/goplus/cjson/actions/workflows/go.yml)
-[![GitHub release](https://img.shields.io/github/v/tag/goplus/cjson.svg?label=release)](https://github.com/goplus/cjson/releases)
-[![GoDoc](https://pkg.go.dev/badge/github.com/goplus/cjson.svg)](https://pkg.go.dev/github.com/goplus/cjson)
-[![Compiler](https://img.shields.io/badge/compiler-llgo-darkgreen.svg)](https://github.com/goplus/llgo)
-[![Language](https://img.shields.io/badge/language-Go+-blue.svg)](https://github.com/goplus/gop)
 
 ## How to install
+
 ### on macOS (Homebrew)
+
 ```sh
 brew install cjson 
 ```
-### on linux
+
+### on Linux (Debian/Ubuntu)
+
 ```sh
 apt-get install -y libcjson-dev
 ```
-### from source code
-```sh
-git clone https://github.com/goplus/cjson.git
-cd cjson
-git submodule init
-git submodule update
-mkdir build.dir
-cd build.dir
-cmake ../cJSON
-sudo make install
-```
 
 ## Demos