issue2551343 - Remove support for PySQLite and sqlite v2.

It is unmaintained and sqlite3 is used which is the default for a
Python distribution.

CHANGES.txt

@@ -16,6 +16,9 @@ Roundup 2.4.0 is the last release to support Python 2.
 2025-XX-XX 2.5.0
 
 Fixed:
+- issue2551343 - Remove support for PySQLite. It is unmaintained and
+  sqlite3 is used which is the default for a Python distribution.
+  (John Rouillard)
 
 Features:
 

doc/upgrading.txt

@@ -95,7 +95,20 @@ Contents:
 .. contents::
    :local:
 
-.. index:: Upgrading; 2.2.0 to 2.3.0
+.. index:: Upgrading; 2.4.0 to 2.5.0
+
+Migrating from 2.4.0 to 2.5.0
+=============================
+
+Deprecation Notices (info)
+--------------------------
+
+Support for SQLite version 2 has been removed in 2.5.0.  Support for
+the `PySQLite <https://github.com/ghaering/pysqlite>`_ library has
+been removed in 2.5.0. Only the Python supplied sqlite3 library will
+be supported.
+
+.. index:: Upgrading; 2.3.0 to 2.4.0
 
 Migrating from 2.3.0 to 2.4.0
 =============================

roundup/backends/__init__.py

@@ -28,7 +28,7 @@
 _modules = {
     'mysql': ('MySQLdb',),
     'postgresql': ('psycopg2',),
-    'sqlite': ('pysqlite', 'pysqlite2', 'sqlite3', '_sqlite3', 'sqlite'),
+    'sqlite': ('sqlite3', '_sqlite3'),
 }
 
 def get_backend(name):

roundup/backends/back_sqlite.py

@@ -31,14 +31,7 @@
     import sqlite3 as sqlite
     sqlite_version = 3
 except ImportError:
-    try:
-        from pysqlite2 import dbapi2 as sqlite
-        if sqlite.version_info < (2, 1, 0):
-            raise ValueError('pysqlite2 minimum version is 2.1.0+ '
-                             '- %s found' % sqlite.version)
-        sqlite_version = 2
-    except ImportError:
-        raise ValueError("Unable to import sqlite3 or sqlite 2.")
+    raise ValueError("Unable to import sqlite3.")
 
 
 def db_exists(config):