Remove page.pyi: it's out of date, and not necessary (#2924)

Fix #2908

reflex/page.pyi

@@ -1,17 +0,0 @@
-"""The page decorator and associated variables and functions."""
-
-from reflex.components.component import Component
-from reflex.event import EventHandler
-
-DECORATED_PAGES: list
-
-def page(
-    route: str | None = None,
-    title: str | None = None,
-    image: str | None = None,
-    description: str | None = None,
-    meta: str | None = None,
-    script_tags: list[Component] | None = None,
-    on_load: EventHandler | list[EventHandler] | None = None,
-): ...
-def get_decorated_pages() -> list[dict]: ...