fix(authentication): remove providers loader (#6257)

**What**
- remove file leftover from renaming authentication -> auth

packages/authentication/src/loaders/providers.ts

@@ -1,71 +0,0 @@
-import * as defaultProviders from "@providers"
-
-import {
-  asClass,
-  AwilixContainer,
-  ClassOrFunctionReturning,
-  Constructor,
-  Resolver,
-} from "awilix"
-import {
-  AuthModuleProviderConfig,
-  AuthProviderScope,
-  LoaderOptions,
-  ModulesSdkTypes,
-} from "@medusajs/types"
-
-type AuthModuleProviders = {
-  providers: AuthModuleProviderConfig[]
-}
-
-export default async ({
-  container,
-  options,
-}: LoaderOptions<
-  (
-    | ModulesSdkTypes.ModuleServiceInitializeOptions
-    | ModulesSdkTypes.ModuleServiceInitializeCustomDataLayerOptions
-  ) &
-    AuthModuleProviders
->): Promise<void> => {
-  const providerMap = new Map(
-    options?.providers?.map((provider) => [provider.name, provider.scopes]) ??
-      []
-  )
-  // if(options?.providers?.length) {
-  // TODO: implement plugin provider registration
-  // }
-
-  const providersToLoad = Object.values(defaultProviders)
-
-  for (const provider of providersToLoad) {
-    container.register({
-      [`auth_provider_${provider.PROVIDER}`]: asClass(
-        provider as Constructor<any>
-      )
-        .singleton()
-        .inject(() => ({ scopes: providerMap.get(provider.PROVIDER) ?? {} })),
-    })
-  }
-
-  container.register({
-    [`auth_providers`]: asArray(providersToLoad, providerMap),
-  })
-}
-
-function asArray(
-  resolvers: (ClassOrFunctionReturning<unknown> | Resolver<unknown>)[],
-  providerScopeMap: Map<string, Record<string, AuthProviderScope>>
-): { resolve: (container: AwilixContainer) => unknown[] } {
-  return {
-    resolve: (container: AwilixContainer) =>
-      resolvers.map((resolver) =>
-        asClass(resolver as Constructor<any>)
-          .inject(() => ({
-            // @ts-ignore
-            scopes: providerScopeMap.get(resolver.PROVIDER) ?? {},
-          }))
-          .resolve(container)
-      ),
-  }
-}