Remove unused variable

Author: makermelissa

setup.py

@@ -21,7 +21,6 @@
     long_description = "\n" + f.read()
 
 board_reqs = []
-platform_reqs = []
 if os.path.exists("/proc/device-tree/compatible"):
     with open("/proc/device-tree/compatible", "rb") as f:
         compat = f.read()