fix wifi password, clean imports

boot.py

@@ -1,13 +1,13 @@
+import ujson
+import network
 from hal import *
 from time import sleep
-import socket, re, os, uwebsockets, network, binascii, ujson
 
 print("Press Ctrl-C to stop boot script...")
 sleep(0.2)
 
 # read the config file
 config = ujson.loads(open("config.json", "r").read())
-print(config)
 
 # connect to WiFi
 wlan = network.WLAN(network.STA_IF)
@@ -25,9 +25,9 @@ if not wlan.isconnected():
         if ssid in config["wifis"].keys():
             print("connecting to: " + ssid)
             # start to connect to the pre-configured network
-            wlan.connect(ssid, wifis[ssid])
+            wlan.connect(ssid, config["wifis"][ssid])
             break
 
-# Clean up
+# clean up
 import gc
 gc.collect()