The `EGDbContextFactory` class, which implemented the
`IDesignTimeDbContextFactory<EGDbContext>` interface, has been
removed. This includes the `CreateDbContext` method, which handled
design-time DbContext creation by loading configuration from
`appsettings.migration.json`, setting up `DbContextOptions`, and
constructing `DbTriggerParams`.
Additionally, the `#if NET` preprocessor directive and its
corresponding `#endif` have been removed, along with all associated
`using` directives. This change suggests that the factory is no
longer needed due to a shift in the application's architecture or
design-time DbContext handling.