diff --git a/astroid/helpers.py b/astroid/helpers.py
index 9c370aa32..d7c04fe49 100644
--- a/astroid/helpers.py
+++ b/astroid/helpers.py
@@ -6,7 +6,6 @@
 
 from __future__ import annotations
 
-import warnings
 from collections.abc import Generator
 
 from astroid import bases, manager, nodes, objects, raw_building, util
@@ -20,20 +19,7 @@
 )
 from astroid.nodes import scoped_nodes
 from astroid.typing import InferenceResult
-from astroid.util import safe_infer as real_safe_infer
-
-
-def safe_infer(
-    node: nodes.NodeNG | bases.Proxy | util.UninferableBase,
-    context: InferenceContext | None = None,
-) -> InferenceResult | None:
-    # When removing, also remove the real_safe_infer alias
-    warnings.warn(
-        "Import safe_infer from astroid.util; this shim in astroid.helpers will be removed.",
-        DeprecationWarning,
-        stacklevel=2,
-    )
-    return real_safe_infer(node, context=context)
+from astroid.util import safe_infer
 
 
 def _build_proxy_class(cls_name: str, builtins: nodes.Module) -> nodes.ClassDef:
@@ -177,7 +163,7 @@ def has_known_bases(klass, context: InferenceContext | None = None) -> bool:
     except AttributeError:
         pass
     for base in klass.bases:
-        result = real_safe_infer(base, context=context)
+        result = safe_infer(base, context=context)
         # TODO: check for A->B->A->B pattern in class structure too?
         if (
             not isinstance(result, scoped_nodes.ClassDef)
@@ -250,7 +236,7 @@ def object_len(node, context: InferenceContext | None = None):
     # pylint: disable=import-outside-toplevel; circular import
     from astroid.objects import FrozenSet
 
-    inferred_node = real_safe_infer(node, context=context)
+    inferred_node = safe_infer(node, context=context)
 
     # prevent self referential length calls from causing a recursion error
     # see https://github.com/pylint-dev/astroid/issues/777
diff --git a/astroid/nodes/node_classes.py b/astroid/nodes/node_classes.py
index 1d16b747a..52d4d9d3c 100644
--- a/astroid/nodes/node_classes.py
+++ b/astroid/nodes/node_classes.py
@@ -968,7 +968,7 @@ def is_argument(self, name) -> bool:
             return True
         return self.find_argname(name)[1] is not None
 
-    def find_argname(self, argname, rec=DEPRECATED_ARGUMENT_DEFAULT):
+    def find_argname(self, argname):
         """Get the index and :class:`AssignName` node for given name.
 
         :param argname: The name of the argument to search for.
@@ -977,12 +977,6 @@ def find_argname(self, argname, rec=DEPRECATED_ARGUMENT_DEFAULT):
         :returns: The index and node for the argument.
         :rtype: tuple(str or None, AssignName or None)
         """
-        if rec != DEPRECATED_ARGUMENT_DEFAULT:  # pragma: no cover
-            warnings.warn(
-                "The rec argument will be removed in astroid 3.1.",
-                DeprecationWarning,
-                stacklevel=2,
-            )
         if self.arguments:
             index, argument = _find_arg(argname, self.arguments)
             if argument:
diff --git a/astroid/util.py b/astroid/util.py
index 510b81cc1..635f7050f 100644
--- a/astroid/util.py
+++ b/astroid/util.py
@@ -108,19 +108,6 @@ def __str__(self) -> str:
         return msg.format(self.op, self.left_type.name, self.right_type.name)
 
 
-def _instancecheck(cls, other) -> bool:
-    wrapped = cls.__wrapped__
-    other_cls = other.__class__
-    is_instance_of = wrapped is other_cls or issubclass(other_cls, wrapped)
-    warnings.warn(
-        "%r is deprecated and slated for removal in astroid "
-        "2.0, use %r instead" % (cls.__class__.__name__, wrapped.__name__),
-        PendingDeprecationWarning,
-        stacklevel=2,
-    )
-    return is_instance_of
-
-
 def check_warnings_filter() -> bool:
     """Return True if any other than the default DeprecationWarning filter is enabled.