Do not merge information stream into output

This was causing an error where the formatting of the information
streams was dropped, and so just rendered in plaintext. This code now
operates the same was as in version 2.0, where we only merge the error
stream into the output.

Author: SeeminglyScience

src/PowerShellEditorServices/Utility/PSCommandExtensions.cs

@@ -66,7 +66,6 @@ public static PSCommand MergePipelineResults(this PSCommand psCommand)
                 // We need to do merge errors and output before rendering with an Out- cmdlet
                 Command lastCommand = psCommand.Commands[psCommand.Commands.Count - 1];
                 lastCommand.MergeMyResults(PipelineResultTypes.Error, PipelineResultTypes.Output);
-                lastCommand.MergeMyResults(PipelineResultTypes.Information, PipelineResultTypes.Output);
             }
             return psCommand;
         }