Don't force full PDBs, portable works just fine (#268)

Terminal.Gui/Terminal.Gui.csproj

@@ -3,7 +3,6 @@
     <TargetFrameworks>net461;netcoreapp2.0</TargetFrameworks>
     <RootNamespace>Terminal.Gui</RootNamespace>
     <AssemblyName>Terminal.Gui</AssemblyName>
-    <DebugType>full</DebugType>
     <DocumentationFile>bin\Release\Terminal.Gui.xml</DocumentationFile>
     <GenerateDocumentationFile Condition=" '$(Configuration)' == 'Release' ">true</GenerateDocumentationFile>
   </PropertyGroup>