don't ref NetTopologySuite unnecessarily

Author: mgravell

src/NRedisStack/NRedisStack.csproj

@@ -15,7 +15,6 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="NetTopologySuite"/>
         <PackageReference Include="StackExchange.Redis"/>
         <PackageReference Include="System.Text.Json" Condition="'$(TargetFramework)' == 'netstandard2.0' or '$(TargetFramework)' == 'net481'"/>
         <None Include="../../Redis.png" Link="Redis.png" Pack="true" PackagePath="/" Visible="false"/>