Remove references to App Center in build files and docs

Author: AliSoftware

WordPress/Credentials/Secrets-example.swift

@@ -20,7 +20,6 @@ class ApiCredentials: NSObject {
     // Other Services
     static let tenorApiKey = ""
     static let sentryDSN = ""
-    static let appCenterAppId = ""
     static let encryptedLogKey = ""
     static let debuggingKey = ""
     static let docsBotId = ""

docs/feature-flags.md

@@ -15,7 +15,7 @@ case localDeveloper // debug
 case a8cBranchTest // alpha
 
 /// Beta released internally for Automattic employees
-case a8cPrereleaseTesting. // internal - AppCenter / TestFlight
+case a8cPrereleaseTesting. // internal - Firebase App Distribution / TestFlight
 
 /// Production build released in the app store
 case appStore // release

fastlane/env/project.env-example

@@ -1,8 +1,6 @@
 INT_EXPORT_TEAM_ID=<Team id for internal distribution>
 EXT_EXPORT_TEAM_ID=<Team id for public distribution>
 
-APPCENTER_PUBLIC_ID=<AppCenter Public Id>
-
 FASTLANE_ITC_TEAM_ID=<Team ID for AppStore Connect>
 
 SENTRY_ORG_SLUG=<Org Slug for Sentry>

fastlane/env/user.env-example

@@ -2,7 +2,6 @@ FASTLANE_USER=<Your Apple ID for fastlane>
 DELIVER_USER=<Your Apple ID for fastlane>
 
 GHHELPER_ACCESS=<GitHub access token>
-APPCENTER_API_TOKEN=<AppCenter Api Token>
 SENTRY_AUTH_TOKEN=<Sentry Auth Token>
 
 BUILDKITE_TOKEN=<Buildkite Personal Access Token>