diff --git a/backend/src/federation/client/FederationClient.ts b/backend/src/federation/client/FederationClient.ts
deleted file mode 100644
index db1e5e3b2..000000000
--- a/backend/src/federation/client/FederationClient.ts
+++ /dev/null
@@ -1,55 +0,0 @@
-import { FederatedCommunity as DbFederatedCommunity } from '@entity/FederatedCommunity'
-
-import { ApiVersionType } from '@/federation/enum/apiVersionType'
-
-import { FederationClient_1_0 } from './FederationClient_1_0'
-import { FederationClient_1_1 } from './FederationClient_1_1'
-
-type FederationClientType = FederationClient_1_0 | FederationClient_1_1
-
-interface ClientInstance {
-  id: number
-  // eslint-disable-next-line no-use-before-define
-  client: FederationClientType
-}
-
-// eslint-disable-next-line @typescript-eslint/no-extraneous-class
-export class FederationClient {
-  private static instanceArray: ClientInstance[] = []
-
-  /**
-   * The Singleton's constructor should always be private to prevent direct
-   * construction calls with the `new` operator.
-   */
-  // eslint-disable-next-line no-useless-constructor, @typescript-eslint/no-empty-function
-  private constructor() {}
-
-  private static createFederationClient = (dbCom: DbFederatedCommunity) => {
-    switch (dbCom.apiVersion) {
-      case ApiVersionType.V1_0:
-        return new FederationClient_1_0(dbCom)
-      case ApiVersionType.V1_1:
-        return new FederationClient_1_1(dbCom)
-      default:
-        return null
-    }
-  }
-
-  /**
-   * The static method that controls the access to the singleton instance.
-   *
-   * This implementation let you subclass the Singleton class while keeping
-   * just one instance of each subclass around.
-   */
-  public static getInstance(dbCom: DbFederatedCommunity): FederationClientType | null {
-    const instance = FederationClient.instanceArray.find((instance) => instance.id === dbCom.id)
-    if (instance) {
-      return instance.client
-    }
-    const client = FederationClient.createFederationClient(dbCom)
-    if (client) {
-      FederationClient.instanceArray.push({ id: dbCom.id, client } as ClientInstance)
-    }
-    return client
-  }
-}
diff --git a/backend/src/federation/client/FederationClient_1_0.ts b/backend/src/federation/client/FederationClient_1_0.ts
deleted file mode 100644
index c8e878ded..000000000
--- a/backend/src/federation/client/FederationClient_1_0.ts
+++ /dev/null
@@ -1,48 +0,0 @@
-import { FederatedCommunity as DbFederatedCommunity } from '@entity/FederatedCommunity'
-import { GraphQLClient } from 'graphql-request'
-
-import { getPublicKey } from '@/federation/query/getPublicKey'
-import { backendLogger as logger } from '@/server/logger'
-
-export class FederationClient_1_0 {
-  dbCom: DbFederatedCommunity
-  endpoint: string
-  client: GraphQLClient
-
-  constructor(dbCom: DbFederatedCommunity) {
-    this.dbCom = dbCom
-    this.endpoint = `${dbCom.endPoint.endsWith('/') ? dbCom.endPoint : dbCom.endPoint + '/'}${
-      dbCom.apiVersion
-    }/`
-    this.client = new GraphQLClient(this.endpoint, {
-      method: 'GET',
-      jsonSerializer: {
-        parse: JSON.parse,
-        stringify: JSON.stringify,
-      },
-    })
-  }
-
-  getPublicKey = async (): Promise<string | undefined> => {
-    logger.info('Federation: getPublicKey from endpoint', this.endpoint)
-    try {
-      // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
-      const { data } = await this.client.rawRequest(getPublicKey, {})
-      // eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
-      if (!data?.getPublicKey?.publicKey) {
-        logger.warn('Federation: getPublicKey without response data from endpoint', this.endpoint)
-        return
-      }
-      logger.info(
-        'Federation: getPublicKey successful from endpoint',
-        this.endpoint,
-        // eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
-        data.getPublicKey.publicKey,
-      )
-      // eslint-disable-next-line @typescript-eslint/no-unsafe-return, @typescript-eslint/no-unsafe-member-access
-      return data.getPublicKey.publicKey
-    } catch (err) {
-      logger.warn('Federation: getPublicKey failed for endpoint', this.endpoint)
-    }
-  }
-}
diff --git a/backend/src/federation/client/FederationClient_1_1.ts b/backend/src/federation/client/FederationClient_1_1.ts
deleted file mode 100644
index 27679b423..000000000
--- a/backend/src/federation/client/FederationClient_1_1.ts
+++ /dev/null
@@ -1,3 +0,0 @@
-import { FederationClient_1_0 } from './FederationClient_1_0'
-
-export class FederationClient_1_1 extends FederationClient_1_0 {}