Bug 1844908 - Remove unused Windows version check functions. r=handyman

Differential Revision: https://phabricator.services.mozilla.com/D184309

mfbt/WindowsVersion.h

@@ -14,73 +14,6 @@
 
 namespace mozilla {
 
-inline bool IsWindowsVersionOrLater(uint32_t aVersion) {
-  static Atomic<uint32_t> minVersion(0);
-  static Atomic<uint32_t> maxVersion(UINT32_MAX);
-
-  if (minVersion >= aVersion) {
-    return true;
-  }
-
-  if (aVersion >= maxVersion) {
-    return false;
-  }
-
-  OSVERSIONINFOEXW info;
-  ZeroMemory(&info, sizeof(OSVERSIONINFOEXW));
-  info.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEXW);
-  info.dwMajorVersion = aVersion >> 24;
-  info.dwMinorVersion = (aVersion >> 16) & 0xFF;
-  info.wServicePackMajor = (aVersion >> 8) & 0xFF;
-  info.wServicePackMinor = aVersion & 0xFF;
-
-  DWORDLONG conditionMask = 0;
-  VER_SET_CONDITION(conditionMask, VER_MAJORVERSION, VER_GREATER_EQUAL);
-  VER_SET_CONDITION(conditionMask, VER_MINORVERSION, VER_GREATER_EQUAL);
-  VER_SET_CONDITION(conditionMask, VER_SERVICEPACKMAJOR, VER_GREATER_EQUAL);
-  VER_SET_CONDITION(conditionMask, VER_SERVICEPACKMINOR, VER_GREATER_EQUAL);
-
-  if (VerifyVersionInfoW(&info,
-                         VER_MAJORVERSION | VER_MINORVERSION |
-                             VER_SERVICEPACKMAJOR | VER_SERVICEPACKMINOR,
-                         conditionMask)) {
-    minVersion = aVersion;
-    return true;
-  }
-
-  maxVersion = aVersion;
-  return false;
-}
-
-inline bool IsWindowsBuildOrLater(uint32_t aBuild) {
-  static Atomic<uint32_t> minBuild(0);
-  static Atomic<uint32_t> maxBuild(UINT32_MAX);
-
-  if (minBuild >= aBuild) {
-    return true;
-  }
-
-  if (aBuild >= maxBuild) {
-    return false;
-  }
-
-  OSVERSIONINFOEXW info;
-  ZeroMemory(&info, sizeof(OSVERSIONINFOEXW));
-  info.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEXW);
-  info.dwBuildNumber = aBuild;
-
-  DWORDLONG conditionMask = 0;
-  VER_SET_CONDITION(conditionMask, VER_BUILDNUMBER, VER_GREATER_EQUAL);
-
-  if (VerifyVersionInfoW(&info, VER_BUILDNUMBER, conditionMask)) {
-    minBuild = aBuild;
-    return true;
-  }
-
-  maxBuild = aBuild;
-  return false;
-}
-
 inline bool IsWindows10BuildOrLater(uint32_t aBuild) {
   static Atomic<uint32_t> minBuild(0);
   static Atomic<uint32_t> maxBuild(UINT32_MAX);
@@ -118,26 +51,6 @@ inline bool IsWindows10BuildOrLater(uint32_t aBuild) {
   return false;
 }
 
-MOZ_ALWAYS_INLINE bool IsWin7SP1OrLater() {
-  return IsWindowsVersionOrLater(0x06010100ul);
-}
-
-MOZ_ALWAYS_INLINE bool IsWin8OrLater() {
-  return IsWindowsVersionOrLater(0x06020000ul);
-}
-
-MOZ_ALWAYS_INLINE bool IsWin8Point1OrLater() {
-  return IsWindowsVersionOrLater(0x06030000ul);
-}
-
-MOZ_ALWAYS_INLINE bool IsWin10OrLater() {
-  return IsWindowsVersionOrLater(0x0a000000ul);
-}
-
-MOZ_ALWAYS_INLINE bool IsWin10November2015UpdateOrLater() {
-  return IsWindows10BuildOrLater(10586);
-}
-
 MOZ_ALWAYS_INLINE bool IsWin10AnniversaryUpdateOrLater() {
   return IsWindows10BuildOrLater(14393);
 }
@@ -150,60 +63,14 @@ MOZ_ALWAYS_INLINE bool IsWin10FallCreatorsUpdateOrLater() {
   return IsWindows10BuildOrLater(16299);
 }
 
-MOZ_ALWAYS_INLINE bool IsWin10April2018UpdateOrLater() {
-  return IsWindows10BuildOrLater(17134);
-}
-
 MOZ_ALWAYS_INLINE bool IsWin10Sep2018UpdateOrLater() {
   return IsWindows10BuildOrLater(17763);
 }
 
-MOZ_ALWAYS_INLINE bool IsWin10May2019UpdateOrLater() {
-  return IsWindows10BuildOrLater(18362);
-}
-
 MOZ_ALWAYS_INLINE bool IsWin11OrLater() {
   return IsWindows10BuildOrLater(22000);
 }
 
-MOZ_ALWAYS_INLINE bool IsNotWin7PreRTM() {
-  return IsWin7SP1OrLater() || IsWindowsBuildOrLater(7600);
-}
-
-inline bool IsWin7AndPre2000Compatible() {
-  /*
-   * See Bug 1279171.
-   * We'd like to avoid using WMF on specific OS version when compatibility
-   * mode is in effect. The purpose of this function is to check if FF runs on
-   * Win7 OS with application compatibility mode being set to 95/98/ME.
-   * Those compatibility mode options (95/98/ME) can only display and
-   * be selected for 32-bit application.
-   * If the compatibility mode is in effect, the GetVersionEx function will
-   * report the OS as it identifies itself, which may not be the OS that is
-   * installed.
-   * Note : 1) We only target for Win7 build number greater than 7600.
-   *        2) GetVersionEx may be altered or unavailable for release after
-   *           Win8.1. Set pragma to avoid build warning as error.
-   */
-  bool isWin7 = IsNotWin7PreRTM() && !IsWin8OrLater();
-  if (!isWin7) {
-    return false;
-  }
-
-  OSVERSIONINFOEXW info;
-  ZeroMemory(&info, sizeof(OSVERSIONINFOEXW));
-
-  info.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEXW);
-#pragma warning(push)
-#pragma warning(disable : 4996)
-  bool success = GetVersionExW((LPOSVERSIONINFOW)&info);
-#pragma warning(pop)
-  if (!success) {
-    return false;
-  }
-  return info.dwMajorVersion < 5;
-}
-
 // Whether we're a Windows 11 build with "Suggested actions" feature which
 // causes hangs. See bug 1774285.
 MOZ_ALWAYS_INLINE bool NeedsWindows11SuggestedActionsWorkaround() {