sci-libs/proj: remove unused patch(es)

Package-Manager: Portage-3.0.30, Repoman-3.0.3
Signed-off-by: Michael Mair-Keimberger <mmk@levelnine.at>
Closes: https://github.com/gentoo/gentoo/pull/23816
Signed-off-by: Andrew Ammerlaan <andrewammerlaan@gentoo.org>

sci-libs/proj/files/proj-8.1.0-test_factory-include.patch

@@ -1,29 +0,0 @@
-https://patch-diff.githubusercontent.com/raw/OSGeo/PROJ/pull/2760.patch
-
-From fc983b6e3343ba4d52fd0a889bb6bbf6f143f417 Mon Sep 17 00:00:00 2001
-From: Even Rouault <even.rouault@spatialys.com>
-Date: Thu, 1 Jul 2021 21:24:26 +0200
-Subject: [PATCH] =?UTF-8?q?test=5Ffactory.cpp:=20fix=20build,=20in=20parti?=
- =?UTF-8?q?cular=20on=20Alpine=20Edge=20(fixes=C2=A0#2759)?=
-MIME-Version: 1.0
-Content-Type: text/plain; charset=UTF-8
-Content-Transfer-Encoding: 8bit
-
----
- test/unit/test_factory.cpp | 2 ++
- 1 file changed, 2 insertions(+)
-
-diff --git a/test/unit/test_factory.cpp b/test/unit/test_factory.cpp
-index 985499150e..a60296d10a 100644
---- a/test/unit/test_factory.cpp
-+++ b/test/unit/test_factory.cpp
-@@ -39,6 +39,8 @@
- #include "proj/metadata.hpp"
- #include "proj/util.hpp"
- 
-+#include <algorithm>
-+
- #include <sqlite3.h>
- 
- #ifdef _MSC_VER
-