0.3.0: remove vm tests

test/module/walk_up_for_modules_dir/a/b/walk_up_for_modules_dir.wren

@@ -0,0 +1,3 @@
+// Walk up parent directories from the root script to find "wren_modules".
+import "foo"
+// expect: ran foo module

test/module/walk_up_for_modules_dir/wren_modules/foo/foo.wren

@@ -0,0 +1,2 @@
+// nontest
+System.print("ran foo module")