Remove unused library

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@1417 0c269be4-1314-0410-8aa9-9f06e86f4224

windows/libjackdmp.dsp

@@ -241,10 +241,6 @@ SOURCE=.\resource.rc
 
 SOURCE=..\common\shm.c
 # End Source File
-# Begin Source File
-
-SOURCE="..\..\..\..\pthreads-win32\pthreadVC2.lib"
-# End Source File
 # End Group
 # Begin Group "Header Files"