build: remove ChangeLog, as it’s convenient enough to have it in Git.

Makefile.am

@@ -13,11 +13,6 @@ EXTRA_DIST = bootstrap build-osx build-win32 AUTHORS \
 ACLOCAL_AMFLAGS = -I m4
 AUTOMAKE_OPTIONS = foreign dist-bzip2
 
-update-changelog: FORCE
-	git --help >/dev/null 2>&1 \
-	  && test -d .git \
-	  && git log --stat | awk 'function flush() { if (m != "") { print "Commit: " v "\nAuthor: " a m } m=""; v="UNSUBMITTED" } { if ($$1 == "commit") flush(); else if ($$1 == "Author:") { a = $$2 } else if ($$1 == "git-svn-id:") { split($$2,tmp,"@"); v=tmp[2] } else if ($$_ != "    ") { m=m "\n" $$_ } } END { flush() }' > ChangeLog
-
 echo-dirs: ; echo src test
 
 FORCE: