Remove make-orig-tar-gz target

This target wasn't kept up to date and was totally broken for the git
world. The way we use git has made this target pretty well impossible to
use in any form, so it's been supersceded by a script that is currently
located at
http://people.debian.org/~dnusinow/xsf_scripts/git-make-orig-tar-gz

debian/xsfbs/xsfbs.mk

@@ -272,29 +272,6 @@ prune-upstream-tree:
 	dh_testdir
 	grep -rvh '^#' debian/prune/ | xargs --no-run-if-empty rm -rf
 
-# Change to what should be the correct directory, ensure it is, and if
-# so, create the .orig.tar.gz file.  Exclude the debian directory and its
-# contents, and any .svn directories and their contents (so that we can safely
-# build an .orig.tar.gz from SVN checkout, not just an export).
-#
-# Note: This rule is for Debian package maintainers' convenience, and is not
-# needed for conventional build scenarios.
-#
-# This rule *IS* the recommended method for creating a new .orig.tar.gz file,
-# for the rare situations when one is needed.
-.PHONY: make-orig-tar-gz
-make-orig-tar-gz: clean prune-upstream-tree
-	( cd .. \
-	  && if [ $(shell basename $(CURDIR)) != $(SOURCE_NAME)-$(NO_EPOCH_VER) ]; then \
-	    echo "Our current working directory has the wrong name. Renaming..." >&2; \
-		mv $(CURDIR) $(SOURCE_NAME)-$(NO_EPOCH_VER); \
-	  fi; \
-	    tar --exclude=debian --exclude=debian/* \
-	        --exclude=.svn --exclude=.svn/* \
-	        -cf - $(SOURCE_NAME)-$(NO_EPOCH_VER) \
-	    | gzip -9 >$(SOURCE_NAME)_$(NO_EPOCH_VER).orig.tar.gz; \
-	   )
-
 # Verify that there are no offsets or fuzz in the patches we apply.
 #
 # Note: This rule is for Debian package maintainers' convenience, and is not