!172 【轻量级 PR】：sync readme with code

Merge pull request !172 from yangming_ha/N/A

README.md

@@ -58,7 +58,6 @@ build/lite                      # Primary directory
 │   ├── kernel                  # Build configuration parameters of the kernel
 │   └── subsystem               # Subsystem template
 ├── ndk                          # NDK-related build scripts and configuration parameters
-├── product                     # Full configuration tables of the product, which contain configuration units, the subsystem list, and the compiler
 └── toolchain                   # Build toolchain, which contain the compiler directories, build options, and linking options
 ```
 

README_zh.md

@@ -58,7 +58,6 @@ build/lite                      # 编译构建主目录
 │   ├── kernel                  # 内核的编译配置参数
 │   └── subsystem               # 子系统模板
 ├── ndk                         # Native API相关编译脚本与配置参数
-├── product                     # 产品全量配置表，包括：配置单元、子系统列表、编译器等。
 └── toolchain                   # 编译工具链相关，包括：编译器路径、编译选项、链接选项等。
 ```