boto: Remove obsolete patch

pkgs/development/python-modules/boto/content-length-str.patch

@@ -1,16 +0,0 @@
-Cherry-picked from https://github.com/boto/boto/pull/2932
-
-This fix is required for things like docker-registry to interact with S3. Will
-be obsolete after the next boto release (> 2.36.0)
-
---- a/boto/connection.py
-+++ b/boto/connection.py
-@@ -381,7 +381,7 @@ class HTTPRequest(object):
-         if 'Content-Length' not in self.headers:
-             if 'Transfer-Encoding' not in self.headers or \
-                     self.headers['Transfer-Encoding'] != 'chunked':
--                self.headers['Content-Length'] = len(self.body)
-+                self.headers['Content-Length'] = str(len(self.body))
-
-
- class HTTPResponse(http_client.HTTPResponse):

pkgs/top-level/python-packages.nix

@@ -1308,8 +1308,6 @@ let
     buildInputs = [ self.nose self.mock ];
     propagatedBuildInputs = [ self.requests self.httpretty ];
 
-    patches = [ ../development/python-modules/boto/content-length-str.patch ];
-
     meta = {
       homepage = https://github.com/boto/boto;