[gnome-boxes] Revert "util: Add is_mime_type()"

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit bcd15ef94837b58705bfad0c6ac07e0aaef6d81a
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Sat Dec 21 14:18:47 2013 +0000

    Revert "util: Add is_mime_type()"
    
    This reverts commit a9e6af5fa88c3748bbf748f68450eea95dd2b3b8.
    
    We don't need this utility function anymore.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=720801

 src/util-app.vala |    7 -------
 1 files changed, 0 insertions(+), 7 deletions(-)
---
diff --git a/src/util-app.vala b/src/util-app.vala
index 1be7111..a4fca09 100644
--- a/src/util-app.vala
+++ b/src/util-app.vala
@@ -637,13 +637,6 @@ namespace Boxes {
         return tokens[1];
     }
 
-    public bool is_mime_type (string filename, string mime_type) {
-        var file_type = ContentType.guess (filename, null, null);
-        var supertype = ContentType.from_mime_type (mime_type);
-
-        return ContentType.is_a (file_type, supertype);
-    }
-
     namespace UUID {
         [CCode (cname = "uuid_generate", cheader_filename = "uuid/uuid.h")]
         internal extern static void generate ([CCode (array_length = false)] uchar[] uuid);