Remove CustomViews feature

This has been broken for at least (probably) a year so its usage is
minimal. We're removing it and the associated
`PowerShellEditorServices.VSCode` module.

Author: andyleejordan

.vsts-ci/templates/ci-general.yml

@@ -96,7 +96,7 @@ steps:
     targetType: inline
     pwsh: true
     script: |
-      $assembly = [Reflection.Assembly]::LoadFile('$(Build.SourcesDirectory)/vscode-powershell/modules/PowerShellEditorServices.VSCode/bin/Microsoft.PowerShell.EditorServices.VSCode.dll')
+      $assembly = [Reflection.Assembly]::LoadFile("$(Build.SourcesDirectory)/vscode-powershell/modules/PowerShellEditorServices/bin/Core/Microsoft.PowerShell.EditorServices.Hosting.dll")
       if ($assembly.GetCustomAttributes([System.Diagnostics.DebuggableAttribute], $true).IsJITOptimizerDisabled) {
         Write-Host '##vso[task.LogIssue type=error;]PowerShell Editor Services bits were not built in release configuration!'
         exit 1

examples/ContentViewTest.ps1

@@ -6,7 +6,6 @@ import TelemetryReporter from "@vscode/extension-telemetry";
 import { DocumentSelector } from "vscode-languageclient";
 import { CodeActionsFeature } from "./features/CodeActions";
 import { ConsoleFeature } from "./features/Console";
-import { CustomViewsFeature } from "./features/CustomViews";
 import { DebugSessionFeature } from "./features/DebugSession";
 import { ExamplesFeature } from "./features/Examples";
 import { ExpandAliasFeature } from "./features/ExpandAlias";
@@ -156,7 +155,6 @@ export async function activate(context: vscode.ExtensionContext): Promise<IPower
         new DebugSessionFeature(context, sessionManager, logger),
         new PickPSHostProcessFeature(logger),
         new HelpCompletionFeature(),
-        new CustomViewsFeature(),
         new PickRunspaceFeature(logger),
         externalApi
     ];

src/features/CustomViews.ts

@@ -709,7 +709,6 @@ export class SessionManager implements Middleware {
             "-HostName 'Visual Studio Code Host' " +
             "-HostProfileId 'Microsoft.VSCode' " +
             `-HostVersion '${this.HostVersion}' ` +
-            "-AdditionalModules @('PowerShellEditorServices.VSCode') " +
             `-BundledModulesPath '${utils.escapeSingleQuotes(bundledModulesPath)}' ` +
             "-EnableConsoleRepl ";