feat(media): 图片占位改为纯色块并去掉扫光

lib/pages/player/widgets/drama_info_sheet.dart

@@ -255,11 +255,7 @@ class _DramaInfoSheetState extends State<DramaInfoSheet> {
             width: _posterWidth,
             child: AspectRatio(
               aspectRatio: 3 / 4,
-              child: RemoteImage(
-                drama.posterUrl,
-                fit: BoxFit.cover,
-                showFallbackIcon: true,
-              ),
+              child: RemoteImage(drama.posterUrl, fit: BoxFit.cover),
             ),
           ),
         ),
@@ -466,11 +462,7 @@ class _DramaInfoSheetState extends State<DramaInfoSheet> {
                     width: _relatedWidth,
                     child: AspectRatio(
                       aspectRatio: 3 / 4,
-                      child: RemoteImage(
-                        drama.posterUrl,
-                        fit: BoxFit.cover,
-                        showFallbackIcon: true,
-                      ),
+                      child: RemoteImage(drama.posterUrl, fit: BoxFit.cover),
                     ),
                   ),
                 ),