Remove utils module

The module contains just 2 functions, none of which are used in the
project or are interactive. Of them,
`purescript-utils-parse-import-statement-at-point` contains various
Haskell-specific parsing and doesn't sound useful to a common user.
The `purescript-utils-read-directory-name` is just some odd wrapper
for normalizing a path, and unlikely to be useful to anyone outside
the project.

Thus, just remove the module.

Author: Hi-Angel

Makefile

@@ -20,7 +20,6 @@ ELFILES = \
 	purescript-simple-indent.el \
 	purescript-sort-imports.el \
 	purescript-unicode-input-method.el \
-	purescript-utils.el \
 	purescript-decl-scan.el \
 	purescript-yas.el \
 	purescript-vars.el \