remove psycopg2 dependency and change IntegrityError to Django's IntegrityError

Author: RossLYoung

mapit/views/areas.py

@@ -1,5 +1,5 @@
 import re
-from psycopg2 import InternalError
+from django.db import InternalError
 from django.db.utils import DatabaseError
 
 from django.utils.translation import gettext as _

mapit_gb/management/commands/mapit_UK_add_ons_to_gss.py

@@ -7,7 +7,7 @@
 import sys
 from django.core.management.base import BaseCommand
 from mapit.models import Area, CodeType
-from psycopg2 import IntegrityError
+from django.db import IntegrityError
 
 python_version = sys.version_info[0]
 

mapit_gb/management/commands/mapit_UK_update_ons_ids.py

@@ -3,7 +3,7 @@
 import csv
 from django.core.management.base import BaseCommand
 from mapit.models import Area, Generation, CodeType
-from psycopg2 import IntegrityError
+from django.db import IntegrityError
 
 
 class Command(BaseCommand):

mapit_gb/management/commands/mapit_UK_update_ons_ids2.py

@@ -4,7 +4,7 @@
 import csv
 from django.core.management.base import BaseCommand
 from mapit.models import Area, Generation, CodeType
-from psycopg2 import IntegrityError
+from django.db import IntegrityError
 
 
 class Command(BaseCommand):

setup.py

@@ -53,7 +53,6 @@ def read_file(filename):
     install_requires=[
         'Django >= 4.2, <6.0',
         'libsass >= 0.13.3',
-        'psycopg2',
         'PyYAML',
         'Shapely',
         'uk-postcode-utils',