bump to preview8 and remove extra references

Jellyfin.Api/Jellyfin.Api.csproj

@@ -19,7 +19,6 @@
     <PackageReference Include="Microsoft.Extensions.Http" Version="3.1.6" />
     <PackageReference Include="Swashbuckle.AspNetCore" Version="5.5.1" />
     <PackageReference Include="Swashbuckle.AspNetCore.ReDoc" Version="5.5.1" />
-    <PackageReference Include="System.Text.Json" Version="5.0.0-preview.7.20364.11" />
   </ItemGroup>
 
   <ItemGroup>

Jellyfin.Data/Jellyfin.Data.csproj

@@ -22,7 +22,6 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="3.1.6" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="3.1.6" />
-    <PackageReference Include="System.Text.Json" Version="5.0.0-preview.7.20364.11" />
   </ItemGroup>
 
 </Project>

Jellyfin.Server/Jellyfin.Server.csproj

@@ -54,7 +54,6 @@
     <PackageReference Include="Serilog.Sinks.Graylog" Version="2.1.3" />
     <PackageReference Include="SQLitePCLRaw.bundle_e_sqlite3" Version="2.0.3" />
     <PackageReference Include="SQLitePCLRaw.provider.sqlite3.netstandard11" Version="1.1.14" />
-    <PackageReference Include="System.Text.Json" Version="5.0.0-preview.7.20364.11" />
   </ItemGroup>
 
   <ItemGroup>

MediaBrowser.Model/MediaBrowser.Model.csproj

@@ -25,7 +25,7 @@
     <PackageReference Include="Microsoft.AspNetCore.Http.Abstractions" Version="2.2.0" />
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="3.1.6" />
     <PackageReference Include="System.Globalization" Version="4.3.0" />
-    <PackageReference Include="System.Text.Json" Version="5.0.0-preview.7.20364.11" />
+    <PackageReference Include="System.Text.Json" Version="5.0.0-preview.8.20407.11" />
   </ItemGroup>
 
   <ItemGroup>

tests/MediaBrowser.Api.Tests/MediaBrowser.Api.Tests.csproj

@@ -10,7 +10,6 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="3.1.6" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.7.0" />
-    <PackageReference Include="System.Text.Json" Version="5.0.0-preview.7.20364.11" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1" />
     <PackageReference Include="coverlet.collector" Version="1.3.0" />