macOS Tahoe no longer has AGL.framework, remove it

--- ./mkspecs/common/mac.conf.orig      2025-09-17 21:42:08
+++ ./mkspecs/common/mac.conf   2025-09-17 23:13:58
@@ -18,8 +18,7 @@

 # sdk.prf will prefix the proper SDK sysroot
 QMAKE_INCDIR_OPENGL     = \
-    /System/Library/Frameworks/OpenGL.framework/Headers \
-    /System/Library/Frameworks/AGL.framework/Headers/
+    /System/Library/Frameworks/OpenGL.framework/Headers

 QMAKE_FIX_RPATH         = install_name_tool -id

@@ -30,7 +29,7 @@
 QMAKE_REL_RPATH_BASE    = @loader_path

 QMAKE_LIBS_DYNLOAD      =
-QMAKE_LIBS_OPENGL       = -framework OpenGL -framework AGL
+QMAKE_LIBS_OPENGL       = -framework OpenGL
 QMAKE_LIBS_THREAD       =

 QMAKE_INCDIR_WAYLAND    =