Removed prints and extract function from init module

ebook_converter/ebooks/metadata/book/base.py

@@ -1,6 +1,5 @@
 import copy, traceback
 
-from ebook_converter import prints
 from ebook_converter.constants_old import DEBUG
 from ebook_converter.ebooks.metadata.book import (SC_COPYABLE_FIELDS,
         SC_FIELDS_COPY_NOT_NULL, STANDARD_METADATA_FIELDS,
@@ -453,12 +452,12 @@ class Metadata(object):
     # Old Metadata API {{{
     def print_all_attributes(self):
         for x in STANDARD_METADATA_FIELDS:
-            prints('%s:'%x, getattr(self, x, 'None'))
+            print('%s:' % x, getattr(self, x, 'None'))
         for x in self.custom_field_keys():
             meta = self.get_user_metadata(x, make_copy=False)
             if meta is not None:
-                prints(x, meta)
-        prints('--------------')
+                print(x, meta)
+        print('--------------')
 
     def smart_update(self, other, replace_metadata=False):
         '''