Prevent sandbox violation when installing

https://bugs.gentoo.org/521546

--- a/guile-config/Makefile.am
+++ b/guile-config/Makefile.am
@@ -39,8 +39,3 @@ guile-config: guile-config.in ${top_builddir}/libguile/libpath.h
 	    -e s:@-GUILE_VERSION-@:${GUILE_VERSION}:
 	chmod +x guile-config.tmp
 	mv guile-config.tmp guile-config
-
-## Get rid of any copies of the configuration script under the old
-## name, so people don't end up running ancient copies of it.
-install-exec-local:
-	rm -f ${bindir}/build-guile