Remove unneeded package reference to GemBox.Spreadsheet.

Author: claudiamurialdo

dotnet/src/dotnetcore/GxExcel/GxExcel.csproj

@@ -17,7 +17,6 @@
 
   <ItemGroup>
     <PackageReference Include="EPPlus" Version="4.5.3.2" />
-    <PackageReference Include="GemBox.Spreadsheet" Version="49.0.1454" PrivateAssets="All"/>
     <PackageReference Include="log4net" Version="2.0.15" />
     <PackageReference Include="System.Security.Cryptography.Pkcs" Version="6.0.3" />
   </ItemGroup>