remove std.filesystem

Author: TylerMSFT

docs/build/reference/experimental-module.md

@@ -17,7 +17,7 @@ Enables compiler support for Microsoft's experimental form of C++ Standard modul
 
  This switch applies to the time before the new, standardized, way of consuming the C++ Standard Library as modules was available. Although you can use this switch to use the older experimental named modules, we recommend that you use the new, standardized, way of consuming the C++ Standard Library as modules described in [Import the C++ standard library using modules](../../cpp/tutorial-import-stl-named-module.md).
 
-This compiler switch is available starting in Visual Studio 2015 Update 1. In the VS Installer under the **Individual components** tab, ensure that **C++ Modules for v143 build tools (x64/x86 - experimental)** in selected. You can use the search box with **experimental** to find it. For more information, see [Install C and C++ support in Visual Studio](../vscpp-step-0-installation.md).
+This compiler switch is available starting in Visual Studio 2015 Update 1. In the VS Installer under the **Individual components** tab, ensure that **C++ Modules for v143 build tools (x64/x86 - experimental)** is selected. You can use the search box with **experimental** to find it. For more information, see [Install C and C++ support in Visual Studio](../vscpp-step-0-installation.md).
 
 | Version  | Status |
 |---|---|

docs/cpp/modules-cpp.md

@@ -166,9 +166,10 @@ You can use a traditional header file to control which modules are imported:
 
 ```cpp
 // MyProgram.h
+#ifdef C_RUNTIME_GLOBALS
+import std.compat;
+#else
 import std;
-#ifdef DEBUG_LOGGING
-import std.filesystem;
 #endif
 ```