Bug 1748391 - Remove advertisement for the Visual Studio backend. r=firefox-build-system-reviewers,mhentges

The VS backend is always built when building on Windows for Windows, so
in practice, the message isn't printed... except when cross-compiling on
Windows, in which case the VS backend doesn't work.

Differential Revision: https://phabricator.services.mozilla.com/D135015

python/mozbuild/mozbuild/config_status.py

@@ -48,18 +48,6 @@ https://firefox-source-docs.mozilla.org/mobile/android/geckoview/contributor/gec
 =============
 """.strip()
 
-VISUAL_STUDIO_ADVERTISEMENT = """
-===============================
-Visual Studio Support Available
-
-You are building Firefox on Windows. You can generate Visual Studio
-files by running:
-
-   mach build-backend --backend=VisualStudio
-
-===============================
-""".strip()
-
 
 def config_status(
     topobjdir=".",
@@ -201,10 +189,6 @@ def config_status(
             for path, diff in sorted(the_backend.file_diffs.items()):
                 print("\n".join(diff))
 
-    # Advertise Visual Studio if appropriate.
-    if os.name == "nt" and "VisualStudio" not in options.backend:
-        print(VISUAL_STUDIO_ADVERTISEMENT)
-
     # Advertise Android Studio if it is appropriate.
     if MachCommandConditions.is_android(env):
         print(ANDROID_IDE_ADVERTISEMENT)