Make it compile again

Author: Pete Luferenko

src/Microsoft.ML.Data/Transforms/ConcatTransform.cs

@@ -929,7 +929,7 @@ public BoundColumn(ISchema inputSchema, ColumnInfo columnInfo, int[] sources, Co
                 public RowMapperColumnInfo MakeColumnInfo()
                 {
                     if (_isIdentity)
-                        return new RowMapperColumnInfo(_columnInfo.Output, OutputType, RowColumnUtils.GetMetadataAsRow(_inputSchema, SrcIndices[0]));
+                        return new RowMapperColumnInfo(_columnInfo.Output, OutputType, RowColumnUtils.GetMetadataAsRow(_inputSchema, SrcIndices[0], x => true));
 
                     var metadata = new ColumnMetadataInfo(_columnInfo.Output);
                     if (_isNormalized)

test/Microsoft.ML.Tests/Scenarios/Api/Estimators/Wrappers.cs

@@ -300,33 +300,6 @@ protected ScorerWrapper<TModel> MakeScorerBasic(TModel predictor, RoleMappedData
         }
     }
 
-    public class MyConcatTransform : IEstimator<TransformWrapper>
-    {
-        private readonly IHostEnvironment _env;
-        private readonly string _name;
-        private readonly string[] _source;
-
-        public MyConcatTransform(IHostEnvironment env, string name, params string[] source)
-        {
-            _env = env;
-            _name = name;
-            _source = source;
-        }
-
-        public TransformWrapper Fit(IDataView input)
-        {
-            var xf = new ConcatTransform(_env, input, _name, _source);
-            var empty = new EmptyDataView(_env, input.Schema);
-            var chunk = ApplyTransformUtils.ApplyAllTransformsToData(_env, xf, empty, input);
-            return new TransformWrapper(_env, chunk);
-        }
-
-        public SchemaShape GetOutputSchema(SchemaShape inputSchema)
-        {
-            throw new NotImplementedException();
-        }
-    }
-
     public sealed class MyBinaryClassifierEvaluator
     {
         private readonly IHostEnvironment _env;