Remove SQL 2000 client-side debugging support (#2981)

Author: edwardneal

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

@@ -2307,13 +2307,6 @@ private static void ChangePassword(string connectionString, SqlConnectionString
             SqlConnectionFactory.SingletonInstance.ClearPool(key);
         }
 
-        //
-        // SQL DEBUGGING SUPPORT
-        //
-
-        // this only happens once per connection
-        // SxS: using named file mapping APIs
-
         internal Task<T> RegisterForConnectionCloseNotification<T>(Task<T> outerTask, object value, int tag)
         {
             // Connection exists,  schedule removal, will be added to ref collection after calling ValidateAndReconnect

src/Microsoft.Data.SqlClient/netfx/src/Microsoft.Data.SqlClient.csproj

@@ -100,9 +100,6 @@
   </ItemGroup>
   <!-- Contains common items shared between NetFx and NetCore -->
   <ItemGroup>
-    <Compile Include="$(CommonSourceRoot)Interop\Windows\AdvApi32\AdvApi32.netfx.cs">
-      <Link>Interop\AdvApi32\AdvApi32.netfx.cs</Link>
-    </Compile>
     <Compile Include="$(CommonSourceRoot)Interop\Windows\Kernel32\FileTypes.cs">
       <Link>Interop\Kernel32\FileTypes.cs</Link>
     </Compile>

src/Microsoft.Data.SqlClient/netfx/src/Microsoft/Data/SqlClient/SqlCommand.cs

@@ -5620,9 +5620,6 @@ private SqlDataReader RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavi
                         optionSettings = GetResetOptionsString(cmdBehavior);
                     }
 
-                    // turn debugging on
-                    _activeConnection.CheckSQLDebug();
-
                     // execute sp
                     Debug.Assert(_rpcArrayOf1[0] == rpc);
                     writeTask = _stateObj.Parser.TdsExecuteRPC(this, _rpcArrayOf1, timeout, inSchema, this.Notification, _stateObj, CommandType.StoredProcedure == CommandType, sync: !asyncWrite);