diff --git a/src/calibre/gui2/library/models.py b/src/calibre/gui2/library/models.py
index 0d70fbc610..9da9a2f538 100644
--- a/src/calibre/gui2/library/models.py
+++ b/src/calibre/gui2/library/models.py
@@ -23,7 +23,6 @@ from calibre.ebooks.metadata.meta import set_metadata as _set_metadata
 from calibre.utils.search_query_parser import SearchQueryParser
 from calibre.library.caches import _match, CONTAINS_MATCH, EQUALS_MATCH, \
     REGEXP_MATCH, MetadataBackup
-from calibre.library.cli import parse_series_string
 from calibre import strftime, isbytestring, prepare_string_for_xml
 from calibre.constants import filesystem_encoding, DEBUG
 from calibre.gui2.library import DEFAULT_SORT
diff --git a/src/calibre/library/sqlite.py b/src/calibre/library/sqlite.py
index 521c275efe..0458ada27b 100644
--- a/src/calibre/library/sqlite.py
+++ b/src/calibre/library/sqlite.py
@@ -16,7 +16,6 @@ from datetime import datetime
 from functools import partial
 
 from calibre.ebooks.metadata import title_sort, author_to_author_sort
-from calibre.utils.config import tweaks
 from calibre.utils.date import parse_date, isoformat
 from calibre import isbytestring, force_unicode
 from calibre.constants import iswindows, DEBUG