Merge | SqlConnectionHelper.cs (#3634)

Author: edwardneal

src/Microsoft.Data.SqlClient/netcore/src/Microsoft.Data.SqlClient.csproj

@@ -830,7 +830,6 @@
     </Compile>
 
     <Compile Include="Microsoft\Data\SqlClient\SqlCommand.netcore.cs" />
-    <Compile Include="Microsoft\Data\SqlClient\SqlConnectionHelper.cs" />
     <Compile Include="Microsoft\Data\SqlClient\SqlInternalConnectionTds.cs" />
     <Compile Include="Microsoft\Data\SqlClient\TdsParser.cs" />
     <Compile Include="Microsoft\Data\SqlClient\TdsParser.RegisterEncoding.cs" />

src/Microsoft.Data.SqlClient/netcore/src/Microsoft/Data/SqlClient/SqlConnectionHelper.cs

@@ -1004,7 +1004,6 @@
     </Compile>
 
     <Compile Include="Microsoft\Data\SqlClient\SqlCommand.netfx.cs" />
-    <Compile Include="Microsoft\Data\SqlClient\SqlConnectionHelper.cs" />
     <Compile Include="Microsoft\Data\SqlClient\SqlInternalConnectionTds.cs" />
     <Compile Include="Microsoft\Data\SqlClient\TdsParser.cs" />
     <Compile Include="Microsoft\Data\SqlClient\TdsParserStateObject.netfx.cs" />