diff --git a/accounting/views/__init__.py b/accounting/views/__init__.py
index 7a9a087..ef9fbdc 100644
--- a/accounting/views/__init__.py
+++ b/accounting/views/__init__.py
@@ -19,7 +19,6 @@
 
 """
 import re
-from datetime import timedelta
 
 from django.db import connection
 from django.db.models import Sum, Case, When, F, Q
@@ -37,7 +36,7 @@ from accounting.utils import ReportUrl
 from mia import settings
 from mia_core.digest_auth import digest_login_required
 from mia_core.period import Period
-from mia_core.utils import Pagination, SqlQuery
+from mia_core.utils import Pagination
 
 
 @require_GET
diff --git a/mia_core/utils.py b/mia_core/utils.py
index ad3a373..e0ba1de 100644
--- a/mia_core/utils.py
+++ b/mia_core/utils.py
@@ -455,22 +455,3 @@ class PaginationException(Exception):
 
     def __init__(self, url):
         self.url = url
-
-
-class SqlQuery:
-    """A SQL query statement with its parameters.
-
-    Args:
-        sql (str): The SQL statement.
-        params (list[str]): the parameters.
-
-    Attributes:
-        sql (str): The SQL statement.
-        params (list[str]): the parameters.
-    """
-    sql = ""
-    params = []
-
-    def __init__(self, sql, params):
-        self.sql = sql
-        self.params = params