Remove bogus tests for clean byte compilation of others' packages

- What if we weren't the reason they broke?
- haskell-stack is gone now
- Not all the packages will necessarily be installable in every
  Emacs version that we support anyway

Author: purcell

Makefile

@@ -153,8 +153,3 @@ $(AUTOLOADS): $(ELFILES)
 		-f batch-update-autoloads "."
 # check if autoloads will really load
 	$(BATCH) -l "$@"
-
-check-external : check-emacs-version $(AUTOLOADS)
-	$(BATCH) -l tests/haskell-external.el                                           \
-                 -f haskell-check-external-batch-and-exit
-	@echo "external packages okay"