Remove dead code

Author: BrianMichell

src/mdio/converters/segy.py

@@ -167,24 +167,14 @@ def _scan_for_headers(
     This is an expensive operation.
     It scans the SEG-Y file in chunks by using ProcessPoolExecutor
     """
-    full_chunk_size = template.full_chunk_size
-    segy_dimensions, chunk_size, segy_headers = get_grid_plan(
+    segy_dimensions, _, segy_headers = get_grid_plan(
         segy_file=segy_file,
         return_headers=True,
         template=template,
-        chunksize=full_chunk_size,
+        chunksize=template.full_chunk_size,
         grid_overrides=grid_overrides,
     )
-    if full_chunk_size != chunk_size:
-        pass
-        # TODO(Dmitriy): implement grid overrides
-        # https://github.com/TGSAI/mdio-python/issues/585
-        # The returned 'chunksize' is used only for grid_overrides. We will need to use it when full
-        # support for grid overrides is implemented
-        # err = "Support for changing full_chunk_size in grid overrides is not yet implemented"
-        # raise NotImplementedError(err)
-
-    full_chunk_size = template.full_chunk_size
+
     return segy_dimensions, segy_headers