Feature to add multiple summary cost items and remove cost items

src/ifcopenshell-python/ifcopenshell/api/cost/remove_cost_item.py

@@ -0,0 +1,10 @@
+class Usecase:
+    def __init__(self, file, **settings):
+        self.file = file
+        self.settings = {"cost_item": None}
+        for key, value in settings.items():
+            self.settings[key] = value
+
+    def execute(self):
+        # TODO: do a deep purge
+        self.file.remove(self.settings["cost_item"])