OpenGL: Remove pre-Win10 leftovers

Qt6's minimum supported platform is Win10 1809, and all pre-Win10
code have already been removed from QtBase long time ago.
These code are trying to support Windows 7 to Windows 8.1, which
nowadays become legacy code and should be removed.

Pick-to: 6.4
Change-Id: I21a979d32d99977107964bccc06fdec7b38cd727
Reviewed-by: Volker Hilsheimer <[email protected]>
Reviewed-by: Mårten Nordheim <[email protected]>

1 files changed, 0 insertions, 9 deletions

diff --git a/src/gui/opengl/qopengl.cpp b/src/gui/opengl/qopengl.cpp
index d8b22050c12..edb359f6866 100644
--- a/src/gui/opengl/qopengl.cpp
+++ b/src/gui/opengl/qopengl.cpp
@@ -200,15 +200,6 @@ struct OsTypeTerm
         const auto osver = QOperatingSystemVersion::current();
 #define Q_WINVER(major, minor) (major << 8 | minor)
         switch (Q_WINVER(osver.majorVersion(), osver.minorVersion())) {
-        case Q_WINVER(6, 1):
-            ver = QStringLiteral("7");
-            break;
-        case Q_WINVER(6, 2):
-            ver = QStringLiteral("8");
-            break;
-        case Q_WINVER(6, 3):
-            ver = QStringLiteral("8.1");
-            break;
         case Q_WINVER(10, 0):
             ver = QStringLiteral("10");
             break;