More cleaning up of forward type hints to fix import errors

src/ifcopenshell-python/ifcopenshell/util/data.py

@@ -30,7 +30,7 @@ class Clipping:
     operand_type: str = "IfcHalfSpaceSolid"
 
     @classmethod
-    def parse(cls, raw_data: Any) -> Union[ifcopenshell.entity_instance, Clipping, None]:
+    def parse(cls, raw_data: Any) -> Union[ifcopenshell.entity_instance, "Clipping", None]:
         """Parse various formats into a clipping object
 
         `raw_data` can be either:

src/ifcopenshell-python/ifcopenshell/util/pset.py

@@ -23,12 +23,12 @@ import ifcopenshell.util.schema
 import ifcopenshell.util.type
 from ifcopenshell.entity_instance import entity_instance
 from functools import lru_cache
-from typing import List, Generator, Optional
+from typing import List, Optional
 
-templates: dict[str, PsetQto] = {}
+templates: dict[str, "PsetQto"] = {}
 
 
-def get_template(schema: str) -> PsetQto:
+def get_template(schema: str) -> "PsetQto":
     global templates
     if schema not in templates:
         templates[schema] = PsetQto(schema)