remove the app.config reference from csproj

Author: REDMOND\xizha

src/ResourceManager/OperationalInsights/Commands.OperationalInsights/Commands.OperationalInsights.csproj

@@ -215,7 +215,6 @@
       <Link>AzureRM.OperationalInsights.psd1</Link>
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
-    <None Include="app.config" />
     <None Include="Microsoft.Azure.Commands.OperationalInsights.dll-Help.psd1">
       <CopyToOutputDirectory>Never</CopyToOutputDirectory>
     </None>