Remove feed interface image impl

Author: jocmp

capy/src/test/java/com/jocmp/capy/accounts/local/LocalAccountDelegateTest.kt

@@ -351,6 +351,7 @@ class LocalAccountDelegateTest {
         override val feedURL: URL,
         override val siteURL: URL? = null,
         override val faviconURL: URL? = null,
+        override val itunesImageURL: String? = null,
         override val items: List<RssItem> = listOf()
     ) : Feed {
         override fun isValid() = true

capy/src/test/java/com/jocmp/capy/fixtures/GenericFeed.kt

@@ -10,6 +10,7 @@ class GenericFeed(
     override val siteURL: URL? = null,
     private val valid: Boolean = true,
     override val faviconURL: URL? = null,
+    override val itunesImageURL: String? = null,
     override val items: List<RssItem> = emptyList(),
 ) : Feed {
     override fun isValid() = valid

feedfinder/src/main/java/com/jocmp/feedfinder/parser/Feed.kt

@@ -15,7 +15,6 @@ interface Feed {
     val faviconURL: URL?
 
     val itunesImageURL: String?
-        get() = null
 
     val items: List<RssItem>
 }