patch 8.2.1316: test 42 is still old style

Problem:    Test 42 is still old style.
Solution:   Turn it into a new style test. (Yegappan Lakshmanan, closes #6561)
diff --git a/src/testdir/Make_all.mak b/src/testdir/Make_all.mak
index a25a480..635087c 100644
--- a/src/testdir/Make_all.mak
+++ b/src/testdir/Make_all.mak
@@ -11,7 +11,7 @@
 SCRIPTS_FIRST = test1.out
 
 # Tests that run on all systems.
-SCRIPTS_ALL = test42.out
+SCRIPTS_ALL =
 
 # Tests that run on most systems, but not on Amiga.
 SCRIPTS_MORE1 =