Remove an obsolete patch.
This fixes the following link failure:
ld: error: duplicate symbol: ddxInputThreadInit
defined at xvnc.c
Xvnc-xvnc.o:(ddxInputThreadInit)defined at Input.c
libvnccommon_la-Input.o:(.text+0xDC0) in archive ./.libs/libvnccommon.a
c++: error: linker command failed with exit code 1 (use -v to see invocation)