opt: sealed LoadingState (#765)

lib/pages/member/content/member_contribute/content/article/member_article.dart

@@ -72,7 +72,6 @@ class _MemberArticleState extends State<MemberArticle>
           errMsg: loadingState.errMsg,
           onReload: _controller.onReload,
         ),
-      LoadingState() => throw UnimplementedError(),
     };
   }
 }

lib/pages/member/content/member_contribute/content/bangumi/member_bangumi.dart

@@ -93,7 +93,6 @@ class _MemberBangumiState extends State<MemberBangumi>
           errMsg: loadingState.errMsg,
           onReload: _controller.onReload,
         ),
-      LoadingState() => throw UnimplementedError(),
     };
   }
 }

lib/pages/member/content/member_contribute/content/favorite/member_favorite.dart

@@ -73,7 +73,6 @@ class _MemberFavoriteState extends State<MemberFavorite>
           errMsg: loadingState.errMsg,
           onReload: _controller.onReload,
         ),
-      LoadingState() => throw UnimplementedError(),
     };
   }
 

lib/pages/member/content/member_contribute/content/season_series/season_series_page.dart

@@ -106,7 +106,6 @@ class _SeasonSeriesPageState extends State<SeasonSeriesPage>
             _controller.onReload();
           },
         ),
-      LoadingState() => throw UnimplementedError(),
     };
   }
 }

lib/pages/member/content/member_contribute/content/video/member_video.dart

@@ -230,7 +230,6 @@ class _MemberVideoState extends State<MemberVideo>
           errMsg: loadingState.errMsg,
           onReload: _controller.onReload,
         ),
-      LoadingState() => throw UnimplementedError(),
     };
   }
 }

lib/pages/member/content/member_home/member_home.dart

@@ -237,7 +237,6 @@ class _MemberHomeState extends State<MemberHome>
             )
           : errorWidget(),
       Error() => errorWidget(),
-      LoadingState() => throw UnimplementedError(),
     };
   }
 

lib/pages/member/member_page.dart

@@ -291,7 +291,6 @@ class _MemberPageNewState extends State<MemberPageNew> {
               child: SizedBox(height: 56, width: double.infinity),
             ),
       Error() => _errorWidget(userState.errMsg),
-      LoadingState() => throw UnimplementedError(),
     };
   }
 }

lib/pages/member/widget/edit_profile_page.dart

@@ -204,7 +204,6 @@ class _EditProfilePageState extends State<EditProfilePage> {
           errMsg: loadingState.errMsg,
           onReload: _getInfo,
         ),
-      LoadingState() => throw UnimplementedError(),
     };
   }