Avoid conflicting overloads

Signed-off-by: sowjanyakch <sowjanya.kch@gmail.com>

app/src/test/java/com/nextcloud/talk/contacts/repository/FakeRepositorySuccess.kt

@@ -29,8 +29,4 @@ class FakeRepositorySuccess : ContactsRepository {
     override fun getImageUri(avatarId: String, requestBigSize: Boolean): String {
         return "https://mydomain.com/index.php/avatar/$avatarId/512"
     }
-
-    override fun getImageUri(avatarId: String, requestBigSize: Boolean): String {
-        TODO("Not yet implemented")
-    }
 }