igniteui-angular/migrations/update-18_2_3/changes/theme-changes.json

Ignite UI for Angular is a dependency-free Angular toolkit for building modern web apps

{
  "$schema": "../../common/schema/theme-changes.schema.json",
  "changes": [
    {
      "name": "$header-time-period-color",
      "remove": true,
      "owner": "time-picker-theme",
      "type":"property"
    }
  ]
}