[Config] Revert merge of ConfigSwift into Config (#11769)

FirebaseRemoteConfigSwift/Sources/FirebaseRemoteConfigValueDecoderHelper.swift

@@ -0,0 +1,56 @@
+/*
+ * Copyright 2021 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import Foundation
+import FirebaseRemoteConfig
+import FirebaseSharedSwift
+
+/// Implement the FirebaseRemoteConfigValueDecoding protocol for the shared Firebase decoder to
+/// decode Remote Config Values. It returns the four different kinds of values from
+/// a RemoteConfigValue object.
+struct FirebaseRemoteConfigValueDecoderHelper: FirebaseRemoteConfigValueDecoding {
+  let value: RemoteConfigValue
+
+  func numberValue() -> NSNumber {
+    return value.numberValue
+  }
+
+  func boolValue() -> Bool {
+    return value.boolValue
+  }
+
+  func stringValue() -> String {
+    return value.stringValue ?? ""
+  }
+
+  func dataValue() -> Data {
+    return value.dataValue
+  }
+
+  func arrayValue() -> [AnyHashable]? {
+    guard let value = value.jsonValue as? [AnyHashable] else {
+      return nil
+    }
+    return value
+  }
+
+  func dictionaryValue() -> [String: AnyHashable]? {
+    guard let value = value.jsonValue as? [String: AnyHashable] else {
+      return nil
+    }
+    return value
+  }
+}