Remove previous from ssl import

The fix is good, but forgot to remove the non-guarded `from ssl import ...`

Author: dhalbert

adafruit_httpserver/server.py

@@ -13,7 +13,6 @@
     pass
 
 from errno import EAGAIN, ECONNRESET, ETIMEDOUT
-from ssl import SSLContext, create_default_context
 from sys import implementation
 from time import monotonic, sleep
 from traceback import print_exception