dev-ruby/patron: remove unused patch(es)

Signed-off-by: Michael Mair-Keimberger <mm1ke@gentoo.org>

dev-ruby/patron/files/patron-0.13.3-fix-warning.patch

@@ -1,24 +0,0 @@
-From 2b84ba489fb28f474195d215be7cc6bed43c32bc Mon Sep 17 00:00:00 2001
-From: Olle Jonsson <olle.jonsson@gmail.com>
-Date: Thu, 2 Apr 2020 21:02:51 +0200
-Subject: [PATCH] Avoid warning `*' interpreted as argument prefix
-
----
- lib/patron/request.rb | 4 ++--
- 1 file changed, 2 insertions(+), 2 deletions(-)
-
-diff --git a/lib/patron/request.rb b/lib/patron/request.rb
-index 9050ef2..3ac998a 100644
---- a/lib/patron/request.rb
-+++ b/lib/patron/request.rb
-@@ -34,8 +34,8 @@ def initialize
-       :low_speed_time, :low_speed_limit, :progress_callback
-     ]
- 
--    attr_reader *READER_VARS
--    attr_writer *WRITER_VARS
-+    attr_reader(*READER_VARS)
-+    attr_writer(*WRITER_VARS)
- 
-     # Set the type of authentication to use for this request.
-     #