ws: Drop /etc/cockpit creation in make install-tests

Not needed, and really shouldn't be there.

src/ws/Makefile-ws.am

@@ -139,7 +139,7 @@ mock_pam_conv_mod_so_LDFLAGS = -shared
 mock_pam_conv_mod_so_LDADD = $(PAM_LIBS)
 
 install-tests::
-	mkdir -p $(DESTDIR)$(pamdir) $(DESTDIR)/etc/cockpit
+	mkdir -p $(DESTDIR)$(pamdir)
 	$(INSTALL_PROGRAM) mock-pam-conv-mod.so $(DESTDIR)$(pamdir)/
 
 install-exec-hook::