Bug 1844908 - Remove pre-Win10-specific codepath from toolkit/system/…

…windowsPackageManager/. r=bhearsum,nrishel

Differential Revision: https://phabricator.services.mozilla.com/D184303

toolkit/system/windowsPackageManager/nsWindowsPackageManager.cpp

@@ -5,7 +5,6 @@
 
 #include "nsWindowsPackageManager.h"
 #include "mozilla/Logging.h"
-#include "mozilla/WindowsVersion.h"
 #include "mozilla/WinHeaderOnlyUtils.h"
 #include "mozilla/mscom/EnsureMTA.h"
 #ifndef __MINGW32__
@@ -49,11 +48,6 @@ nsWindowsPackageManager::FindUserInstalledPackages(
 #ifdef __MINGW32__
   return NS_ERROR_NOT_IMPLEMENTED;
 #else
-  // The classes we're using are only available beginning with Windows 10
-  if (!mozilla::IsWin10OrLater()) {
-    return NS_ERROR_NOT_IMPLEMENTED;
-  }
-
   ComPtr<IInspectable> pmInspectable;
   ComPtr<Deployment::IPackageManager> pm;
   HRESULT hr = RoActivateInstance(
@@ -116,11 +110,6 @@ nsWindowsPackageManager::GetInstalledDate(uint64_t* ts) {
 #ifdef __MINGW32__
   return NS_ERROR_NOT_IMPLEMENTED;
 #else
-  // The classes we're using are only available beginning with Windows 10
-  if (!mozilla::IsWin10OrLater()) {
-    return NS_ERROR_NOT_IMPLEMENTED;
-  }
-
   ComPtr<ApplicationModel::IPackageStatics> pkgStatics;
   HRESULT hr = RoGetActivationFactory(
       HStringReference(RuntimeClass_Windows_ApplicationModel_Package).Get(),
@@ -157,9 +146,8 @@ nsWindowsPackageManager::GetCampaignId(nsAString& aCampaignId) {
 #ifdef __MINGW32__
   return NS_ERROR_NOT_IMPLEMENTED;
 #else
-  // The classes we're using are only available beginning with Windows 10,
-  // and this is only relevant for MSIX packaged builds.
-  if (!mozilla::IsWin10OrLater() || !mozilla::HasPackageIdentity()) {
+  // This is only relevant for MSIX packaged builds.
+  if (!mozilla::HasPackageIdentity()) {
     return NS_ERROR_NOT_IMPLEMENTED;
   }