Remove unused import

Author: kevinpschaaf

lib/mixins/property-effects.js

@@ -18,7 +18,7 @@ import { camelToDashCase, dashToCamelCase } from '../utils/case-map.js';
 import { PropertyAccessors } from './property-accessors.js';
 /* for annotated effects */
 import { TemplateStamp } from './template-stamp.js';
-import { sanitizeDOMValue, legacyOptimizations } from '../utils/settings.js';
+import { sanitizeDOMValue } from '../utils/settings.js';
 
 // Monotonically increasing unique ID used for de-duping effects triggered
 // from multiple properties in the same turn