Remove private/public overlap from meta tests

Those will go in their own test

test/blackbox-tests/test-cases/meta-gen/jbuild

@@ -6,13 +6,10 @@
   (public_name foobar)
   (synopsis "contains \"quotes\"")))
 
-(library
- ((name privatelib)))
-
 (library
  ((name foobar_baz)
   (public_name foobar.baz)
-  (libraries (bytes privatelib))
+  (libraries (bytes))
   (modes (byte))
   (synopsis "sub library with modes set to byte")))
 

test/blackbox-tests/test-cases/meta-gen/run.t

@@ -8,7 +8,7 @@
   package "baz" (
     directory = "baz"
     description = "sub library with modes set to byte"
-    requires = "bytes privatelib"
+    requires = "bytes"
     archive(byte) = "foobar_baz.cma"
     archive(native) = "foobar_baz.cmxa"
     plugin(byte) = "foobar_baz.cma"