Refs #23919, #27778 -- Removed obsolete mentions of unicode.

django/db/backends/oracle/base.py

@@ -526,7 +526,7 @@ class CursorIterator:
 
 def _rowfactory(row, cursor):
     # Cast numeric values as the appropriate Python type based upon the
-    # cursor description, and convert strings to unicode.
+    # cursor description.
     casted = []
     for value, desc in zip(row, cursor.description):
         if value is not None and desc[1] is Database.NUMBER:

django/db/models/fields/__init__.py

@@ -366,7 +366,7 @@ class Field(RegisterLookupMixin):
         Note that the positional or keyword arguments must contain values of the
         following types (including inner values of collection types):
 
-         * None, bool, str, unicode, int, long, float, complex, set, frozenset, list, tuple, dict
+         * None, bool, str, int, float, complex, set, frozenset, list, tuple, dict
          * UUID
          * datetime.datetime (naive), datetime.date
          * top-level classes, top-level functions - will be referenced by their full import path

django/db/models/fields/files.py

@@ -314,7 +314,7 @@ class FileField(Field):
         # needed because we need to consume values that are also sane for a
         # regular (non Model-) Form to find in its cleaned_data dictionary.
         if data is not None:
-            # This value will be converted to unicode and stored in the
+            # This value will be converted to str and stored in the
             # database, so leaving False as-is is not acceptable.
             if not data:
                 data = ''