Fix attempt to export env file

Author: WolfgangSenff

addons/godot-firebase/firebase/firebase.gd

@@ -15,8 +15,6 @@ const _ENVIRONMENT_VARIABLES : String = "firebase/environment_variables"
 const _EMULATORS_PORTS : String = "firebase/emulators/ports"
 const _AUTH_PROVIDERS : String = "firebase/auth_providers"
 
-@export_global_file("*.env") var EnvPath : String
-
 ## @type FirebaseAuth
 ## The Firebase Authentication API.
 @onready var Auth : FirebaseAuth = $Auth
@@ -101,7 +99,7 @@ func _check_emulating() -> void:
 func _load_config() -> void:
     if not (_config.apiKey != "" and _config.authDomain != ""):
         var env = ConfigFile.new()
-	var err = env.load("res://addons/godot-firebase/.env" if EnvPath == "" else EnvPath)
+        var err = env.load("res://addons/godot-firebase/.env")
         if err == OK:
             for key in _config.keys():
                 var config_value = _config[key]