diff --git a/issue22701002_20001.diff b/issue22701002_20001.diff
deleted file mode 100644
index f963598..0000000
--- a/issue22701002_20001.diff
+++ /dev/null
@@ -1,67 +0,0 @@
-# HG changeset patch
-# User Cédric Krier <cedric.krier@b2ck.com>
-Time.check_required must test against None
-
-
-datetime.time(0) is considered as False by Python.
-
-issue5229
-review22701002
-
-Index: tryton/tryton/gui/window/view_form/model/field.py
-===================================================================
-
---- a/tryton/tryton/gui/window/view_form/model/field.py
-+++ b/tryton/tryton/gui/window/view_form/model/field.py
-@@ -67,10 +67,13 @@
-         context.update(record.expr_eval(self.attrs.get('context', {})))
-         return context
-
-+    def _is_empty(self, record):
-+        return not self.get_eval(record)
-+
-     def check_required(self, record):
-         state_attrs = self.get_state_attrs(record)
-         if bool(int(state_attrs.get('required') or 0)):
--            if (not self.get_eval(record)
-+            if (self._is_empty(record)
-                     and not bool(int(state_attrs.get('readonly') or 0))):
-                 return False
-         return True
-@@ -255,6 +258,9 @@
-
-     _default = None
-
-+    def _is_empty(self, record):
-+        return self.get(record) is None
-+
-     def set_client(self, record, value, force_change=False):
-         if isinstance(value, datetime.datetime):
-             value = value.time()
-@@ -269,6 +275,9 @@
-
-     _default = None
-
-+    def _is_empty(self, record):
-+        return self.get(record) is None
-+
-     def converter(self, record):
-         # TODO allow local context converter
-         return rpc.CONTEXT.get(self.attrs.get('converter'))
-@@ -287,13 +296,8 @@
- class FloatField(Field):
-     _default = None
-
--    def check_required(self, record):
--        state_attrs = self.get_state_attrs(record)
--        if bool(int(state_attrs.get('required') or 0)):
--            if (self.get(record) is None
--                    and not bool(int(state_attrs.get('readonly') or 0))):
--                return False
--        return True
-+    def _is_empty(self, record):
-+        return self.get(record) is None
-
-     def get(self, record):
-         return record.value.get(self.name, self._default)
-
diff --git a/series b/series
index 5661ef7..b3ef429 100644
--- a/series
+++ b/series
@@ -33,7 +33,6 @@ issue19491002_1.diff
 issue20451002_1.diff
 issue5118.diff
 issue18801002_1.diff
-issue22701002_20001.diff
 # Ignore next patches
 #incremental_wait_in_retries.diff
 # Uncomment in calfruitos and basidelta