Added nested_delete and config_delete

tests/test_nested_set.py

@@ -2,7 +2,7 @@ from typing import Any, Dict, List
 
 import pytest
 
-from libbot import sync
+from libbot.sync._nested import nested_delete, nested_set
 
 
 @pytest.mark.parametrize(
@@ -33,9 +33,7 @@ def test_nested_set_valid(
     create_missing: bool,
     expected: Any,
 ):
-    assert (
-        sync.nested_set(target, value, *path, create_missing=create_missing)
-    ) == expected
+    assert (nested_set(target, value, *path, create_missing=create_missing)) == expected
 
 
 @pytest.mark.parametrize(
@@ -59,5 +57,25 @@ def test_nested_set_invalid(
 ):
     with pytest.raises(expected):
         assert (
-            sync.nested_set(target, value, *path, create_missing=create_missing)
+            nested_set(target, value, *path, create_missing=create_missing)
         ) == expected
+
+
+@pytest.mark.parametrize(
+    "target, path, expected",
+    [
+        ({"foo": "bar"}, ["foo"], {}),
+        ({"foo": "bar", "bar": "foo"}, ["bar"], {"foo": "bar"}),
+        (
+            {"foo": {"bar": {}}},
+            ["foo", "bar"],
+            {"foo": {}},
+        ),
+    ],
+)
+def test_nested_delete(
+    target: Dict[str, Any],
+    path: List[str],
+    expected: Any,
+):
+    assert (nested_delete(target, *path)) == expected