update remove_user_as_admin

backend/rooms.py

@@ -302,4 +302,27 @@ def regenerate_invite_code(room_id):
         "status": "updated",
         "room_id": room_id,
         "invite_code": new_code
-    }
+    }
+
+def remove_room_member(room_id, user_id):
+    member = fetch_one(
+        """
+        SELECT 1
+        FROM room_members
+        WHERE room_id = ? AND user_id = ?
+        """,
+        (room_id, user_id)
+    )
+
+    if member is None:
+        return False
+
+    execute(
+        """
+        DELETE FROM room_members
+        WHERE room_id = ? AND user_id = ?
+        """,
+        (room_id, user_id)
+    )
+
+    return True