Stopped deleting from the geometry_columns view on PostGIS

On PostGIS < 2, geometry_columns is a table that was manually maintained.
It's a view on PostGIS 2.

django/contrib/gis/db/backends/postgis/models.py

@@ -9,9 +9,8 @@ from django.utils.encoding import python_2_unicode_compatible
 @python_2_unicode_compatible
 class PostGISGeometryColumns(models.Model):
     """
-    The 'geometry_columns' table from the PostGIS. See the PostGIS
+    The 'geometry_columns' view from PostGIS. See the PostGIS
     documentation at Ch. 4.3.2.
-    On PostGIS 2, this is a view.
     """
     f_table_catalog = models.CharField(max_length=256)
     f_table_schema = models.CharField(max_length=256)

django/contrib/gis/db/backends/postgis/schema.py

@@ -7,7 +7,6 @@ class PostGISSchemaEditor(DatabaseSchemaEditor):
     rast_index_wrapper = 'ST_ConvexHull(%s)'
 
     sql_add_spatial_index = "CREATE INDEX %(index)s ON %(table)s USING %(index_type)s (%(column)s %(ops)s)"
-    sql_clear_geometry_columns = "DELETE FROM geometry_columns WHERE f_table_name = %(table)s"
 
     def __init__(self, *args, **kwargs):
         super(PostGISSchemaEditor, self).__init__(*args, **kwargs)
@@ -59,12 +58,6 @@ class PostGISSchemaEditor(DatabaseSchemaEditor):
             self.execute(sql)
         self.geometry_sql = []
 
-    def delete_model(self, model):
-        super(PostGISSchemaEditor, self).delete_model(model)
-        self.execute(self.sql_clear_geometry_columns % {
-            "table": self.geo_quote_name(model._meta.db_table),
-        })
-
     def add_field(self, model, field):
         super(PostGISSchemaEditor, self).add_field(model, field)
         # Create geometry columns