Remove windowsShellHelper from strict null checks

Currently broken for duplicated typings

src/tsconfig.strictNullChecks.json

@@ -33,6 +33,7 @@
 		"./vs/base/common/decorators.ts",
 		"./vs/base/common/diff/diff.ts",
 		"./vs/base/common/diff/diffChange.ts",
+		"./vs/base/common/errorMessage.ts",
 		"./vs/base/common/errors.ts",
 		"./vs/base/common/errorsWithActions.ts",
 		"./vs/base/common/event.ts",
@@ -92,7 +93,6 @@
 		"./vs/code/electron-main/theme.ts",
 		"./vs/code/node/shellEnv.ts",
 		"./vs/editor/browser/config/elementSizeObserver.ts",
-		"./vs/editor/common/commands/replaceCommand.ts",
 		"./vs/editor/common/commands/surroundSelectionCommand.ts",
 		"./vs/editor/common/config/editorOptions.ts",
 		"./vs/editor/common/config/editorZoom.ts",
@@ -235,7 +235,6 @@
 		"./vs/workbench/parts/search/common/constants.ts",
 		"./vs/workbench/parts/terminal/browser/terminalWidgetManager.ts",
 		"./vs/workbench/parts/terminal/common/terminal.ts",
-		"./vs/workbench/parts/terminal/node/windowsShellHelper.ts",
 		"./vs/workbench/parts/welcome/page/electron-browser/vs_code_welcome_page.ts",
 		"./vs/workbench/services/activity/common/activity.ts",
 		"./vs/workbench/services/backup/common/backup.ts",