Removed invalid include from SendGrid.ruleset

Author: danjagnow

src/SendGrid/SendGrid.ruleset

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <RuleSet Name="Rules for SendGrid" Description="Code analysis rules for SendGrid." ToolsVersion="14.0">
-  <Include Path="..\..\..\GitHub\sendgrid-csharp\src\SendGrid\sendgrid.ruleset" Action="Default" />
   <Rules AnalyzerId="Microsoft.Analyzers.ManagedCodeAnalysis" RuleNamespace="Microsoft.Rules.Managed">
     <Rule Id="CA1001" Action="Warning" />
     <Rule Id="CA1009" Action="Warning" />