test_example_blocking_httpserver.py: remove httpserver.clear()

Remove this call as it is not needed here.

Author: csernazs

tests/examples/test_example_blocking_httpserver.py

@@ -16,7 +16,6 @@ def httpserver():
 
     yield server
 
-    server.clear()
     if server.is_running():
         server.stop()