update 2.1.0 beta.1

Author: funnygeeker

README.ZH-CN.md

@@ -28,7 +28,6 @@
 ```python
 # 这是一个使用示例 This is an example of usage
 import time
-import framebuf
 from machine import SPI, Pin
 from driver import st7735_buf
 from lib.easydisplay import EasyDisplay

README.md

@@ -27,7 +27,6 @@ For images in the `dat` format, make sure that they do not exceed the screen dis
 ```python
 # 这是一个使用示例 This is an example of usage
 import time
-import framebuf
 from machine import SPI, Pin
 from driver import st7735_buf
 from lib.easydisplay import EasyDisplay

main.py

@@ -1,6 +1,5 @@
 # 这是一个使用示例 This is an example of usage
 import time
-import framebuf
 from machine import SPI, Pin
 from driver import st7735_buf
 from lib.easydisplay import EasyDisplay