test: remove package-wide import assumptions

test/wcc/data/modfn_coexist/aa/aa.ww

@@ -1,5 +1,4 @@
-// #30 dir-package — the imported module `aa`. Paired with ../main.ww,
-// whose primary package also declares a value-namespace `fn aa`. Driver:
-// the modfn_coexist leg of the decl-namespace gate (NNN_declns_sep.c).
+// #30 dir-package — the imported package whose declared name supplies the
+// `aa` binding in ../main.ww. Driver: the declns leg of sepimport_test.
 package aa;
 export fn helper() i32 = { return 5; };