remove a now obsolete comment

Somehow this comment has survived even though we don't use BUILT_SOURCES
here any more

lib/libvcc/vmodtool.py

@@ -72,8 +72,6 @@ libvmod_XXX_la_LDFLAGS = \\
 
 nodist_libvmod_XXX_la_SOURCES = vcc_if.c vcc_if.h
 
-# BUILT_SOURCES is only a hack
-# and dependency tracking does not help for the first build
 $(libvmod_XXX_la_OBJECTS): vcc_if.h
 
 vcc_if.h vmod_XXX.rst vmod_XXX.man.rst: vcc_if.c

lib/libvmod_debug/Makefile.am

@@ -35,7 +35,6 @@ nodist_libvmod_debug_la_SOURCES = \
 	vcc_if.c \
 	vcc_if.h
 
-# BUILT_SOURCES is only a hack and dependency tracking does not help for the first build
 $(libvmod_debug_la_OBJECTS): vcc_if.h
 
 vcc_if.h vmod_debug.rst vmod_debug.man.rst: vcc_if.c