Reverting failed mering of SOC2014_TASKBAR.

Command: git svn dcommit is aborted, and the two branches is diverged.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77589 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

build/files

@@ -757,7 +757,6 @@ GUI_CMN_HDR =
     wx/statbox.h
     wx/stattext.h
     wx/statusbr.h
-    wx/taskbarbutton.h
     wx/testing.h
     wx/textcompleter.h
     wx/textctrl.h
@@ -1626,7 +1625,6 @@ MSW_SRC =
     src/msw/statusbar.cpp
     src/msw/statline.cpp
     src/msw/stattext.cpp
-    src/msw/taskbarbutton.cpp
     src/msw/toolbar.cpp
     src/msw/textctrl.cpp
     src/msw/textentry.cpp
@@ -1718,7 +1716,6 @@ MSW_HDR =
     wx/msw/statusbar.h
     wx/msw/statline.h
     wx/msw/stattext.h
-    wx/msw/taskbarbutton.h
     wx/msw/toolbar.h
     wx/msw/textctrl.h
     wx/msw/textentry.h