Update README.md

Author: LynnL4

README.md

@@ -5,18 +5,8 @@
 A friendly library for file operation. 
 
 ### Boards
-  Currently, only Kendryte K210 architecture is supported.
+  Nothing special, just have SPI interface
 
-### Features
-#### SD CARD
- SPI|PIN
- :-:|:-:
-MOSI| 28
-MISO| 26
-SCLK| 27
- CS | 29
-  
-
 ### License
 This software is written by LynnL4 for seeed studio
 Email:hongtai.liu@seeed.cc and is licensed under The MIT License. Check License.txt for more information.