removed the 2 extra dependencies.

src/Discord.Net.Rest/Discord.Net.Rest.csproj

@@ -8,10 +8,6 @@
     <TargetFrameworks Condition=" '$(OS)' == 'Windows_NT' ">net461;netstandard2.0;netstandard2.1</TargetFrameworks>
     <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netstandard2.0;netstandard2.1</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup>
-    <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="5.0.0" />
-    <PackageReference Include="Microsoft.Extensions.Http" Version="5.0.0" />
-  </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\Discord.Net.Core\Discord.Net.Core.csproj" />
   </ItemGroup>