Reverting 'Two-factor authentication' support as it cause OSX and docker build failures.

This reverts commit 787a441343.

web/pgadmin/browser/__init__.py

@@ -25,7 +25,6 @@ from flask import current_app, render_template, url_for, make_response, \
 from flask_babelex import gettext
 from flask_gravatar import Gravatar
 from flask_login import current_user, login_required
-from flask_login.utils import login_url
 from flask_security.changeable import change_user_password
 from flask_security.decorators import anonymous_user_required
 from flask_security.recoverable import reset_password_token_status, \
@@ -39,8 +38,6 @@ from werkzeug.datastructures import MultiDict
 
 import config
 from pgadmin import current_blueprint
-from pgadmin.authenticate import get_logout_url
-from pgadmin.authenticate.mfa.utils import mfa_required, is_mfa_enabled
 from pgadmin.settings import get_setting, store_setting
 from pgadmin.utils import PgAdminModule
 from pgadmin.utils.ajax import make_json_response
@@ -698,7 +695,6 @@ def check_browser_upgrade():
 @blueprint.route("/")
 @pgCSRFProtect.exempt
 @login_required
-@mfa_required
 def index():
     """Render and process the main browser window."""
     # Register Gravatar module with the app only if required
@@ -758,11 +754,7 @@ def index():
         username=current_user.username,
         auth_source=auth_source,
         is_admin=current_user.has_role("Administrator"),
-        logout_url=get_logout_url(),
-        requirejs=True,
-        basejs=True,
-        mfa_enabled=is_mfa_enabled(),
-        login_url=login_url,
+        logout_url=_get_logout_url(),
         _=gettext,
         auth_only_internal=auth_only_internal
     ))
@@ -856,7 +848,7 @@ def utils():
             app_version_int=config.APP_VERSION_INT,
             pg_libpq_version=pg_libpq_version,
             support_ssh_tunnel=config.SUPPORT_SSH_TUNNEL,
-            logout_url=get_logout_url(),
+            logout_url=_get_logout_url(),
             platform=sys.platform,
             qt_default_placeholder=QT_DEFAULT_PLACEHOLDER,
             enable_psql=config.ENABLE_PSQL