chore: Remove IFD reference from Tile (#91)

Author: kylebarron

src/async_geotiff/_fetch.py

@@ -89,7 +89,6 @@ async def fetch_tile(
         return Tile(
             x=x,
             y=y,
-            _ifd=self._ifd,
             array=array,
         )
 
@@ -140,7 +139,6 @@ async def fetch_tiles(
             tile = Tile(
                 x=x,
                 y=y,
-                _ifd=self._ifd,
                 array=array,
             )
             final_tiles.append(tile)

src/async_geotiff/_tile.py

@@ -4,8 +4,6 @@
 from typing import TYPE_CHECKING
 
 if TYPE_CHECKING:
-    from async_tiff import ImageFileDirectory
-
     from async_geotiff._array import Array
 
 
@@ -19,8 +17,5 @@ class Tile:
     y: int
     """The tile row index in the GeoTIFF or overview."""
 
-    _ifd: ImageFileDirectory
-    """A reference to the IFD this tile belongs to."""
-
     array: Array
     """The array data for this tile."""