IMPR: form/field validation better memory cleaning

src/js/ui/validate.field.js

@@ -56,7 +56,7 @@ class ValidateField {
     this.#field.removeEventListener('change', this.validate)
     this.#field.removeEventListener('focusout', this.validate)
 
-    this.#field.ValidateField = null
+    delete this.#field.ValidateField
 
     this.#field.classList.remove(`${NAME}--active`)
   }

src/js/ui/validate.form.js

@@ -115,7 +115,7 @@ class ValidateForm {
 
     this.#form.removeEventListener('submit', this.submitHandler)
 
-    this.#form.ValidateForm = null
+    delete this.#form.ValidateForm
     this.#form.classList.remove(`${NAME}--active`)
   }
 }