fix build copy (microsoft#61)

Author: kaibocai

eng/templates/build.yml

@@ -31,10 +31,4 @@ jobs:
             inputs:
                 SourceFolder: $(System.DefaultWorkingDirectory)
                 Contents: "*.tgz"
-                TargetFolder: $(Build.ArtifactStagingDirectory)/buildoutputs
-          - task: PublishPipelineArtifact@1
-            name: PublishPipelineArtifact1
-            displayName: 'Publish Artifact: Build Outputs'
-            inputs:
-              ArtifactName: BuildOutputs
-              TargetPath: $(Build.ArtifactStagingDirectory)
+                TargetFolder: $(Build.ArtifactStagingDirectory)/buildoutputs