WB_DOCKBORDER is dead

the only place that passes it to a window class, does so to a window
class that does not implement that style.

Change-Id: I74d705ed928b797c3456cf23a8074c62d0c12247
Reviewed-on: https://gerrit.libreoffice.org/43072Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

include/tools/wintypes.hxx

@@ -213,9 +213,6 @@ WinBits const WB_SCALE =                0x08000000;
 WinBits const WB_LINESPACING =          0x01000000;
 WinBits const WB_SCROLL =               0x02000000;
 
-// Window-Bits for DockingWindows
-WinBits const WB_DOCKBORDER =           0x00001000;
-
 // Window-Bits for SplitWindow
 WinBits const WB_NOSPLITDRAW =          0x01000000;
 

sfx2/source/doc/iframe.cxx

@@ -108,7 +108,7 @@ public:
 };
 
 IFrameWindow_Impl::IFrameWindow_Impl( vcl::Window *pParent, bool bHasBorder )
-    : Window( pParent, WB_CLIPCHILDREN | WB_NODIALOGCONTROL | WB_DOCKBORDER )
+    : Window( pParent, WB_CLIPCHILDREN | WB_NODIALOGCONTROL )
 {
     if ( !bHasBorder )
         SetBorderStyle( WindowBorderStyle::NOBORDER );

vcl/source/window/dockwin.cxx

@@ -316,8 +316,6 @@ void DockingWindow::ImplInit( vcl::Window* pParent, WinBits nStyle )
     mbDockable              = (nStyle & WB_DOCKABLE) != 0;
     mnFloatBits             = WB_BORDER | (nStyle & DOCKWIN_FLOATSTYLES);
     nStyle                 &= ~(DOCKWIN_FLOATSTYLES | WB_BORDER);
-    if ( nStyle & WB_DOCKBORDER )
-        nStyle |= WB_BORDER;
 
     Window::ImplInit( pParent, nStyle, nullptr );