delete python dependency.

lite/tutorials/source_en/deploy.md

@@ -21,7 +21,6 @@ This document describes how to quickly install MindSpore Lite on the Ubuntu syst
 - Compilation dependencies (basics):
   - [CMake](https://cmake.org/download/) >= 3.14.1
   - [GCC](https://gcc.gnu.org/releases.html) >= 7.3.0
-  - [Python](https://www.python.org/) >= 3.7
   - [Android_NDK r20b](https://dl.google.com/android/repository/android-ndk-r20b-linux-x86_64.zip)
 
   > - `Android_NDK` needs to be installed only when the Arm version is compiled. Skip this dependency when the x86_64 version is compiled.

lite/tutorials/source_zh_cn/deploy.md

@@ -29,7 +29,6 @@
 - 编译依赖（基本项）
   - [CMake](https://cmake.org/download/) >= 3.14.1
   - [GCC](https://gcc.gnu.org/releases.html) >= 7.3.0
-  - [Python](https://www.python.org/) >= 3.7
   - [Android_NDK r20b](https://dl.google.com/android/repository/android-ndk-r20b-linux-x86_64.zip)
 
   > - 仅在编译ARM版本时需要安装`Android_NDK`，编译x86_64版本可跳过此项。