remove all test_all

Stop manually creating the list of tests (and searching missing).
Main level test_all does a search for all test_*
also possible to run by command line with starts

test/test_all.rb

@@ -1,15 +1,4 @@
-require_relative "arm/test_all"
-
-require_relative "elf/test_all"
-
-require_relative "lib/test_all"
-
-require_relative "parfait/test_all"
-
-require_relative "risc/test_all"
-
-require_relative "rubyx/test_all"
-
-require_relative "vm/test_all"
-
-require_relative "vool/test_all"
+Dir["**/test_*.rb"].each { |f|
+  next if f.include?("stash/")
+  require_relative "../#{f}"
+}