Make file plugin config parameter non-optional, remove unused field

core/shared/src/main/java/de/mm20/launcher2/plugin/config/SearchPluginConfig.kt

@@ -4,10 +4,6 @@ import android.os.Bundle
 import de.mm20.launcher2.plugin.config.StorageStrategy
 
 data class SearchPluginConfig(
-    /**
-     * Icon resource to indicate that a result is from this provider
-     */
-    val providerIconRes: Int? = null,
     /**
      * Strategy to store items from this provider in the launcher database
      * @see [StorageStrategy]
@@ -16,7 +12,6 @@ data class SearchPluginConfig(
 ) {
     fun toBundle(): Bundle {
         return Bundle().apply {
-            putInt("providerIconRes", providerIconRes ?: 0)
             putString("storageStrategy", storageStrategy.name)
         }
     }
@@ -24,7 +19,6 @@ data class SearchPluginConfig(
     companion object {
         operator fun invoke(bundle: Bundle): SearchPluginConfig? {
             return SearchPluginConfig(
-                providerIconRes = bundle.getInt("providerIconRes", 0).takeIf { it != 0 },
                 storageStrategy = StorageStrategy.valueOfOrElse(
                     bundle.getString(
                         "storageStrategy",