Remove API key auth; CORS is sufficient.

The React UI running in a browser can't connect to the backend without
punching a hole for CORS, which isn't done by default. We don't need the
API key to protect from browsers, and anything else running on the
user's machine that can access the backend (that's hosted on only
localhost) already has enough control to do damage without using
Liberation as an attack vector.

https://github.com/dcs-liberation/dcs_liberation

qt_ui/windows/QLiberationWindow.py

@@ -23,7 +23,6 @@ from game.debriefing import Debriefing
 from game.layout import LAYOUTS
 from game.server import EventStream, GameContext
 from game.server.dependencies import QtCallbacks, QtContext
-from game.server.security import ApiKeyManager
 from game.theater import ControlPoint, MissionTarget, TheaterGroundObject
 from qt_ui import liberation_install
 from qt_ui.dialogs import Dialog
@@ -116,8 +115,6 @@ class QLiberationWindow(QMainWindow):
         else:
             self.onGameGenerated(self.game)
 
-        logging.debug(f"API Key: {ApiKeyManager.KEY}")
-
     def initUi(self):
         hbox = QSplitter(Qt.Horizontal)
         vbox = QSplitter(Qt.Vertical)