Remove SharpZipLib and System.ValueTuple dependencies

Content.Client/Content.Client.csproj

@@ -14,9 +14,7 @@
     <PackageReference Include="Nett" Version="0.13.0" />
     <PackageReference Include="SixLabors.Core" Version="1.0.0-beta0007" />
     <PackageReference Include="SixLabors.ImageSharp" Version="1.0.0-beta0006" />
-    <PackageReference Include="System.ValueTuple" Version="4.5.0" />
     <PackageReference Include="YamlDotNet" Version="8.1.0" />
-    <PackageReference Include="SharpZipLib" Version="1.2.0" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\RobustToolbox\Lidgren.Network\Lidgren.Network.csproj" />

Content.Server/Content.Server.csproj

@@ -13,7 +13,6 @@
   <Import Project="..\RobustToolbox\MSBuild\Robust.DefineConstants.targets" />
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.Http.Abstractions" Version="2.2.0" />
-    <PackageReference Include="System.ValueTuple" Version="4.5.0" />
     <PackageReference Include="YamlDotNet" Version="8.1.0" />
   </ItemGroup>
   <ItemGroup>

Content.Shared/Content.Shared.csproj

@@ -12,7 +12,6 @@
   </PropertyGroup>
   <Import Project="..\RobustToolbox\MSBuild\Robust.DefineConstants.targets" />
   <ItemGroup>
-    <PackageReference Include="System.ValueTuple" Version="4.5.0" />
     <PackageReference Include="YamlDotNet" Version="8.1.0" />
   </ItemGroup>
   <ItemGroup>

Content.Tests/Content.Tests.csproj

@@ -16,7 +16,6 @@
     <PackageReference Include="NUnit.ConsoleRunner" Version="3.10.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.16.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.4.0" />
-    <PackageReference Include="System.ValueTuple" Version="4.5.0" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\Content.Client\Content.Client.csproj" />