refactor: remove temp configuration

Author: rasendubi

src/i-configuration.ts

@@ -29,12 +29,6 @@ export interface IConfiguration {
   isInitialized(): boolean;
 }
 
-// TODO: replace more abstract `IConfiguration` with some concrete
-// implementation, so we know what to expect from it (i.e., it's
-// probably a bad idea to allow users implementing their own
-// configurations).
-export type Configuration = IConfiguration;
-
 export type ConfigStoreHydrationPacket<T extends Entry> = {
   entries: Record<string, T>;
   environment: Environment;