Remove patch for tomlkit

This seems fixed in version 0.9.1

See here:

https://github.com/sdispater/tomlkit/blob/f8099e6d6cb68bd0e7676252d7c379dc4d49b982/tomlkit/items.py#L168

Bump vendored version of tomlkit

pipenv/vendor/vendor.txt

@@ -29,7 +29,7 @@ six==1.16.0
 termcolor==1.1.0
 toml==0.10.2
 tomli==1.1.0
-tomlkit==0.8.0
+tomlkit==0.9.2
 urllib3==1.26.6
 vistir==0.5.2
 wheel==0.36.2

tasks/vendoring/patches/vendor/tomlkit-items-fix.patch

@@ -1,13 +0,0 @@
-diff --git a/pipenv/vendor/tomlkit/items.py b/pipenv/vendor/tomlkit/items.py
-index 6617c522..9e746a8c 100644
---- a/pipenv/vendor/tomlkit/items.py
-+++ b/pipenv/vendor/tomlkit/items.py
-@@ -50,7 +50,7 @@ def item(value, _parent=None, _sort_keys=False):
-             val[k] = item(v, _parent=val, _sort_keys=_sort_keys)
- 
-         return val
--    elif isinstance(value, list):
-+    elif isinstance(value, (tuple, list)):
-         if value and isinstance(value[0], dict):
-             a = AoT([])
-         else: