Avoid reassigns

Author: WyattBlue

av/container/pyio.py

@@ -38,7 +38,7 @@ def __cinit__(self, file, buffer_size, writeable=None):
             and self.ftell is not None
             and (seekable is None or seekable())
         ):
-            seek_func: seek_func_t = pyio_seek
+            seek_func = pyio_seek
 
         if writeable is None:
             writeable = self.fwrite is not None

av/opaque.py

@@ -55,4 +55,4 @@ def pop(self, name) -> object:
         return self._objects.pop(key, None)
 
 
-opaque_container: OpaqueContainer = OpaqueContainer()
+opaque_container = OpaqueContainer()