[new API integration] Revert "Fix the invocation to ocamlfind for syntax extensions"

This reverts commit 9e17334327cac755a7cf01e4fb513048719150e7.
[new API integration] Revert "fix ocamlfind query for syntax,preprocessor preds"

This reverts commit de21b55b684fc66d5d654409871f84cdece5705c.