postgresql: remove depricated lib (#56641)

lib/ansible/module_utils/postgres.py

@@ -40,20 +40,6 @@ from ansible.module_utils.six import iteritems
 from distutils.version import LooseVersion
 
 
-class LibraryError(Exception):
-    pass
-
-
-def ensure_libs(sslrootcert=None):
-    if not HAS_PSYCOPG2:
-        raise LibraryError('psycopg2 is not installed. we need psycopg2.')
-    if sslrootcert and psycopg2.__version__ < '2.4.3':
-        raise LibraryError('psycopg2 must be at least 2.4.3 in order to use the ca_cert parameter')
-
-    # no problems
-    return None
-
-
 def postgres_common_argument_spec():
     """
     Return a dictionary with connection options.

lib/ansible/modules/database/postgresql/postgresql_db.py

@@ -163,18 +163,16 @@ import pipes
 import subprocess
 import traceback
 
-PSYCOPG2_IMP_ERR = None
 try:
     import psycopg2
     import psycopg2.extras
 except ImportError:
-    PSYCOPG2_IMP_ERR = traceback.format_exc()
     HAS_PSYCOPG2 = False
 else:
     HAS_PSYCOPG2 = True
 
 import ansible.module_utils.postgres as pgutils
-from ansible.module_utils.basic import AnsibleModule, missing_required_lib
+from ansible.module_utils.basic import AnsibleModule
 from ansible.module_utils.database import SQLParseError, pg_quote_identifier
 from ansible.module_utils.six import iteritems
 from ansible.module_utils._text import to_native
@@ -493,8 +491,8 @@ def main():
 
     raw_connection = state in ("dump", "restore")
 
-    if not HAS_PSYCOPG2 and not raw_connection:
-        module.fail_json(msg=missing_required_lib('psycopg2'), exception=PSYCOPG2_IMP_ERR)
+    if not raw_connection:
+        pgutils.ensure_required_libs(module)
 
     # To use defaults values, keyword arguments must be absent, so
     # check which values are empty and don't include in the **kw
@@ -522,7 +520,6 @@ def main():
 
     if not raw_connection:
         try:
-            pgutils.ensure_libs(sslrootcert=module.params.get('ca_cert'))
             db_connection = psycopg2.connect(database=maintenance_db, **kw)
 
             # Enable autocommit so we can create databases