Remove input_structure deprecation warning

All plugins have been updated to use `structure_uuid`.

Author: edan-bainglass

src/aiidalab_qe/common/mixins.py

@@ -1,7 +1,6 @@
 from __future__ import annotations
 
 import typing as t
-import warnings
 
 import traitlets as tl
 
@@ -94,21 +93,7 @@ def _link_model(self, model: M):
             dependency_parts = dependency.rsplit(".", 1)
             if len(dependency_parts) == 1:  # from parent
                 target_model = self
-                if dependency == "input_structure":
-                    # BACKWARDS COMPATIBLE - remove when all plugins are updated!
-                    warnings.warn(
-                        (
-                            "The `input_structure` dependency is deprecated. "
-                            "Please use the `structure_uuid` dependency instead. "
-                            "`input_structure` is now a property that loads the "
-                            "structure by uuid."
-                        ),
-                        DeprecationWarning,
-                        stacklevel=2,
-                    )
-                    trait = "structure_uuid"
-                else:
-                    trait = dependency
+                trait = dependency
             else:  # from sibling
                 sibling, trait = dependency_parts
                 target_model = self.get_model(sibling)