Apply suggestion from @ncooke3

Author: ncooke3

Package.swift

@@ -1667,17 +1667,3 @@ func isFoundationModelsSupportedPlatformSwiftSetting() -> SwiftSetting {
     .when(platforms: [.iOS, .macCatalyst, .macOS, .visionOS])
   )
 }
-
-func appCheckDependency() -> Package.Dependency {
-  let appCheckURL = "https://github.com/google/app-check.git"
-
-  if let localPath = Context.environment["FIREBASE_APP_CHECK_LOCAL_PATH"] {
-    return .package(path: localPath)
-  }
-
-  if let branch = Context.environment["FIREBASE_APP_CHECK_BRANCH"] {
-    return .package(url: appCheckURL, branch: branch)
-  }
-
-  return .package(url: appCheckURL, "11.0.1" ..< "12.0.0")
-}