Remove unnecessary constructor keywords

Author: Eduard Ablekimov

firebase-fetcher/src/main/java/com/ackee/versionupdatehandler/FirebaseVersionFetcher.kt

@@ -9,7 +9,7 @@ import kotlinx.coroutines.tasks.await
 /**
  * Class that fetches version configuration from Firebase Remote.
  */
-class FirebaseVersionFetcher constructor(
+class FirebaseVersionFetcher(
     private val cacheExpiration: Int = 3600,
     private val minimalAttributeName: String = MINIMAL_VERSION,
     private val currentAttributeName: String = CURRENT_VERSION

rest-fetcher/src/main/java/com/ackee/versionupdatehandler/RestVersionFetcher.kt

@@ -22,7 +22,7 @@ import retrofit2.http.GET
  * @author David Bilik [[email protected]]
  * @since 06/02/2017
  */
-class RestVersionFetcher constructor(
+class RestVersionFetcher(
     private val baseUrl: String,
     private val currentAttributeName: String = CURRENT_VERSION,
     private val minimalAttributeName: String = MINIMAL_VERSION