Refs #23913 -- Removed support for a single equals sign in {% if %} tag.

Per deprecation timeline.

django/template/smartif.py

 """
 Parser and utilities for the smart 'if' tag
 """
-import warnings
-
-from django.utils.deprecation import RemovedInDjango110Warning
-
-
 # Using a simple top down parser, as described here:
 #    http://effbot.org/zone/simple-top-down-parsing.htm.
 # 'led' = left denotation
 # 'nud' = null denotation
 # 'bp' = binding power (left = lbp, right = rbp)
 
+
 class TokenBase(object):
     """
     Base class for operators and literals, mainly for debugging and for throwing
@@ -102,8 +98,6 @@ OPERATORS = {
     'not': prefix(8, lambda context, x: not x.eval(context)),
     'in': infix(9, lambda context, x, y: x.eval(context) in y.eval(context)),
     'not in': infix(9, lambda context, x, y: x.eval(context) not in y.eval(context)),
-    # This should be removed in Django 1.10:
-    '=': infix(10, lambda context, x, y: x.eval(context) == y.eval(context)),
     '==': infix(10, lambda context, x, y: x.eval(context) == y.eval(context)),
     '!=': infix(10, lambda context, x, y: x.eval(context) != y.eval(context)),
     '>': infix(10, lambda context, x, y: x.eval(context) > y.eval(context)),
@@ -178,11 +172,6 @@ class IfParser(object):
         except (KeyError, TypeError):
             return self.create_var(token)
         else:
-            if token == '=':
-                warnings.warn(
-                    "Operator '=' is deprecated and will be removed in Django 1.10. Use '==' instead.",
-                    RemovedInDjango110Warning, stacklevel=2
-                )
             return op()
 
     def next_token(self):

tests/template_tests/syntax_tests/test_if.py

-import warnings
-
 from django.template import TemplateSyntaxError
-from django.test import SimpleTestCase, ignore_warnings
-from django.test.utils import reset_warning_registry
-from django.utils.deprecation import RemovedInDjango110Warning
+from django.test import SimpleTestCase
 
 from ..utils import TestObj, setup
 
@@ -526,42 +522,8 @@ class IfTagTests(SimpleTestCase):
         output = self.engine.render_to_string('if-tag-badarg04')
         self.assertEqual(output, 'no')
 
-    @setup({'if-tag-eq-deprecated': '{% if foo = bar %}yes{% else %}no{% endif %}'},
-        test_once=True)
-    def test_if_tag_eq_deprecated(self):
-        reset_warning_registry()
-        with warnings.catch_warnings(record=True) as warns:
-            warnings.simplefilter('always')
-            output = self.engine.render_to_string('if-tag-eq-deprecated')
-            self.assertEqual(output, 'yes')
-        self.assertEqual(len(warns), 1)
-        self.assertEqual(
-            str(warns[0].message),
-            "Operator '=' is deprecated and will be removed in Django 1.10. "
-            "Use '==' instead."
-        )
-
-
-@ignore_warnings(category=RemovedInDjango110Warning)
-class TestEqualitySingleEqualsSign(SimpleTestCase):
-    # The following tests should be changed to template.TemplateSyntaxError
-    # (or simply removed) when the deprecation path ends in Django 1.10.
-    @setup({'if-tag-eq01': '{% if foo = bar %}yes{% else %}no{% endif %}'})
-    def test_if_tag_eq01(self):
-        output = self.engine.render_to_string('if-tag-eq01', {'foo': 1})
-        self.assertEqual(output, 'no')
-
-    @setup({'if-tag-eq02': '{% if foo = bar %}yes{% else %}no{% endif %}'})
-    def test_if_tag_eq02(self):
-        output = self.engine.render_to_string('if-tag-eq02', {'foo': 1, 'bar': 1})
-        self.assertEqual(output, 'yes')
-
-    @setup({'if-tag-eq03': '{% if foo = bar %}yes{% else %}no{% endif %}'})
-    def test_if_tag_eq03(self):
-        output = self.engine.render_to_string('if-tag-eq03', {'foo': 1, 'bar': 2})
-        self.assertEqual(output, 'no')
-
-    @setup({'if-tag-eq04': '{% if foo == \'\' %}yes{% else %}no{% endif %}'})
-    def test_if_tag_eq04(self):
-        output = self.engine.render_to_string('if-tag-eq04')
-        self.assertEqual(output, 'no')
+    @setup({'if-tag-single-eq': '{% if foo = bar %}yes{% else %}no{% endif %}'})
+    def test_if_tag_single_eq(self):
+        # A single equals sign is a syntax error.
+        with self.assertRaises(TemplateSyntaxError):
+            self.engine.render_to_string('if-tag-single-eq', {'foo': 1})