Remove obsolete 'tests' makefile target

The 'docs/examples' code was long ago removed and now the
python code was gone too, the custom 'tests' makefile target
serves no purpose
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

Makefile.am

@@ -71,9 +71,6 @@ rpm: clean
 
 check-local: all tests
 
-tests:
-	@(cd docs/examples ; $(MAKE) MAKEFLAGS+=--silent tests)
-
 cov: clean-cov
 	mkdir $(top_builddir)/coverage
 	$(LCOV) -c -o $(top_builddir)/coverage/libvirt.info.tmp \