Revert "fix smoketest with the improved download tarball (fdo#30837)"

This reverts commit bdbd0385f6972f49a5e954cebb342263f3666c7d.
It is not longer needed after the previous fix.

solenv/inc/installationtest.mk

@@ -39,7 +39,7 @@ my_instsets = $(shell ls -dt \
 installationtest_instset = $(my_instsets:1)
 .ELSE
 installationtest_instset = \
-    $(SOLARSRC)/instsetoo_native/$(INPATH)/LibreOffice/archive/install
+    $(SOLARSRC)/instsetoo_native/$(INPATH)/LibreOffice/archive/install/$(defaultlangiso)
 .END
 
 .IF "$(OS)" == "WNT"