remove unused code in materialize() (dagster-io#21628)

unless I'm missing something

python_modules/dagster/dagster/_core/definitions/materialize.py

@@ -13,7 +13,6 @@
 
 if TYPE_CHECKING:
     from dagster._core.definitions.asset_selection import CoercibleToAssetSelection
-    from dagster._core.definitions.events import AssetKey
 
     from ..execution.execute_in_process_result import ExecuteInProcessResult
 
@@ -90,11 +89,6 @@ def asset2(asset1):
     partition_key = check.opt_str_param(partition_key, "partition_key")
     resources = check.opt_mapping_param(resources, "resources", key_type=str)
 
-    all_executable_keys: Set[AssetKey] = set()
-    for asset in assets:
-        if isinstance(asset, AssetsDefinition):
-            all_executable_keys = all_executable_keys.union(set(asset.keys))
-
     defs = Definitions(
         jobs=[define_asset_job(name=EPHEMERAL_JOB_NAME, selection=selection)],
         assets=assets,