diff --git a/CHANGES.rst b/CHANGES.rst
index 5f12719bc..15f8460f1 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -15,8 +15,12 @@ Unreleased
 - :class:`~wtforms.validators.NoneOf` and :class:`~wtforms.validators.AnyOf`
   can validate multiple valued fields like :class:`~fields.SelectMultipleField`
   :pr:`538` :pr:`807`
+- ⚠️Breaking change⚠️: Some deprecated code was removed (:pr:`859`):
 
-- Breaking change: The key for form errors moved from :data:`None` to
+  - :class:`~wtforms.Flags` can no longer be tuples. :issue:`467`
+  - `iter_choices` needs a tuple of 4 items :issue:`816`
+
+- ⚠️Breaking change⚠️: The key for form errors moved from :data:`None` to
   empty string `""`. :issue:`829` :pr:`858`
 
 .. note::
diff --git a/src/wtforms/fields/core.py b/src/wtforms/fields/core.py
index 777365b36..2155a89ea 100644
--- a/src/wtforms/fields/core.py
+++ b/src/wtforms/fields/core.py
@@ -1,6 +1,5 @@
 import inspect
 import itertools
-import warnings
 
 from markupsafe import escape
 from markupsafe import Markup
@@ -131,17 +130,6 @@ def __init__(
         for v in itertools.chain(self.validators, [self.widget]):
             flags = getattr(v, "field_flags", {})
 
-            # check for legacy format, remove eventually
-            if isinstance(flags, tuple):  # pragma: no cover
-                warnings.warn(
-                    "Flags should be stored in dicts and not in tuples. "
-                    "The next version of WTForms will abandon support "
-                    "for flags in tuples.",
-                    DeprecationWarning,
-                    stacklevel=2,
-                )
-                flags = {flag_name: True for flag_name in flags}
-
             for k, v in flags.items():
                 setattr(self.flags, k, v)
 
diff --git a/src/wtforms/widgets/core.py b/src/wtforms/widgets/core.py
index 0acf9d1e1..832918e82 100644
--- a/src/wtforms/widgets/core.py
+++ b/src/wtforms/widgets/core.py
@@ -1,5 +1,3 @@
-import warnings
-
 from markupsafe import escape
 from markupsafe import Markup
 
@@ -368,32 +366,12 @@ def __call__(self, field, **kwargs):
                 optgroup_params = html_params(label=group)
                 html.append(f"<optgroup {optgroup_params}>")
                 for choice in choices:
-                    if len(choice) == 4:
-                        val, label, selected, render_kw = choice
-                    else:
-                        warnings.warn(
-                            "'iter_groups' is expected to return 4 items tuple since "
-                            "wtforms 3.1, this will be mandatory in wtforms 3.2",
-                            DeprecationWarning,
-                            stacklevel=2,
-                        )
-                        val, label, selected = choice
-                        render_kw = {}
+                    val, label, selected, render_kw = choice
                     html.append(self.render_option(val, label, selected, **render_kw))
                 html.append("</optgroup>")
         else:
             for choice in field.iter_choices():
-                if len(choice) == 4:
-                    val, label, selected, render_kw = choice
-                else:
-                    warnings.warn(
-                        "'iter_choices' is expected to return 4 items tuple since "
-                        "wtforms 3.1, this will be mandatory in wtforms 3.2",
-                        DeprecationWarning,
-                        stacklevel=2,
-                    )
-                    val, label, selected = choice
-                    render_kw = {}
+                val, label, selected, render_kw = choice
                 html.append(self.render_option(val, label, selected, **render_kw))
         html.append("</select>")
         return Markup("".join(html))