remove android version check

Signed-off-by: Marcel Hibbe <dev@mhibbe.de>

app/src/main/java/com/nextcloud/talk/extensions/ImageViewExtensions.kt

@@ -321,11 +321,7 @@ fun ImageView.loadDefaultGroupCallAvatar(viewThemeUtils: ViewThemeUtils): io.rea
 }
 
 fun ImageView.loadDefaultAvatar(viewThemeUtils: ViewThemeUtils): io.reactivex.disposables.Disposable {
-    val data: Any = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-        viewThemeUtils.talk.themePlaceholderAvatar(this, R.drawable.account_circle_96dp) as Any
-    } else {
-        R.drawable.account_circle_96dp
-    }
+    val data: Any = viewThemeUtils.talk.themePlaceholderAvatar(this, R.drawable.account_circle_96dp) as Any
     return loadUserAvatar(data)
 }