Implement metric constraints in the ifcopenshell.api

src/ifcopenshell-python/ifcopenshell/api/constraint/remove_metric.py

@@ -0,0 +1,15 @@
+class Usecase:
+    def __init__(self, file, **settings):
+        self.file = file
+        self.settings = {"metric": None}
+        for key, value in settings.items():
+            self.settings[key] = value
+
+    def execute(self):
+        self.file.remove(self.settings["metric"])
+        for rel in self.file.by_type("IfcRelAssociatesConstraint"):
+            if not rel.RelatingConstraint:
+                self.file.remove(rel)
+        for resource_rel in self.file.by_type("IfcResourceConstraintRelationship"):
+            if not resource_rel.RelatingConstraint:
+                self.file.remove(resource_rel)