config: remove the pkgconfig pc.in file from EXTRA_DIST

Automake always includes it in the tarball.

Signed-off-by: Gaetan Nadon <memsize@videotron.ca>

Makefile.am

@@ -44,7 +44,7 @@ pkgconfigdir = $(libdir)/pkgconfig
 pkgconfig_DATA = xfont.pc
 
 MAINTAINERCLEANFILES = ChangeLog INSTALL
-EXTRA_DIST = xfont.pc.in  include/X11/fonts/fontconf.h.in
+EXTRA_DIST = include/X11/fonts/fontconf.h.in
 
 .PHONY: ChangeLog INSTALL