Address some build warnings

source-api/src/commonMain/kotlin/eu/kanade/tachiyomi/source/model/SManga.kt

@@ -29,36 +29,6 @@ interface SManga : Serializable {
         return genre?.split(", ")?.map { it.trim() }?.filterNot { it.isBlank() }?.distinct()
     }
 
-    fun copyFrom(other: SManga) {
-        if (other.author != null) {
-            author = other.author
-        }
-
-        if (other.artist != null) {
-            artist = other.artist
-        }
-
-        if (other.description != null) {
-            description = other.description
-        }
-
-        if (other.genre != null) {
-            genre = other.genre
-        }
-
-        if (other.thumbnail_url != null) {
-            thumbnail_url = other.thumbnail_url
-        }
-
-        status = other.status
-
-        update_strategy = other.update_strategy
-
-        if (!initialized) {
-            initialized = other.initialized
-        }
-    }
-
     fun copy() = create().also {
         it.url = url
         it.title = title

source-api/src/commonMain/kotlin/eu/kanade/tachiyomi/source/model/UpdateStrategy.kt

@@ -6,6 +6,7 @@ package eu.kanade.tachiyomi.source.model
  *
  * @since extensions-lib 1.4
  */
+@Suppress("UNUSED")
 enum class UpdateStrategy {
     /**
      * Series marked as always update will be included in the library