Do not check for SAL_NO_COMMON_LAYOUT any more

It has no effect except on Windows, and this will go out soon.

Change-Id: I238518624e3288dea259e5ec9d5d76c8f691fd8c

vcl/README.vars

@@ -6,7 +6,6 @@ SAL_USE_VCLPLUGIN - use a VCL plugin
 SAL_NO_NWF - disable native widgets
 SAL_FORCEDPI - force a specific DPI (gtk & gtk3 plugins only)
 SAL_FORCE_HC - force high-contrast mode
-SAL_NO_COMMON_LAYOUT - disable CommonSalLayout layout engine for text layout
 
 VCL_DOUBLEBUFFERING_AVOID_PAINT - don't paint the buffer, useful to see where we do direct painting
 VCL_DOUBLEBUFFERING_FORCE_ENABLE - enable double buffered painting

vcl/source/gdi/sallayout.cxx

@@ -772,8 +772,7 @@ bool SalLayout::IsSpacingGlyph( sal_GlyphId nGlyph )
 
 bool SalLayout::UseCommonLayout()
 {
-    static bool bUse = getenv("SAL_NO_COMMON_LAYOUT") == nullptr;
-    return bUse;
+    return true;
 }
 
 GenericSalLayout::GenericSalLayout()