dev-libs/libdex: drop unused patch

Signed-off-by: Sam James <sam@gentoo.org>

dev-libs/libdex/files/libdex-0.8.1-libucontext-musl.patch

@@ -1,61 +0,0 @@
-https://bugs.gentoo.org/928892
-https://gitlab.gnome.org/GNOME/libdex/-/commit/fc0ef0544dd61ff6d825c53323d4b4cba4481a03
-https://gitlab.gnome.org/GNOME/libdex/-/merge_requests/17
-
-From fc0ef0544dd61ff6d825c53323d4b4cba4481a03 Mon Sep 17 00:00:00 2001
-From: Alfred Wingate <parona@protonmail.com>
-Date: Wed, 29 Jan 2025 07:16:41 +0200
-Subject: [PATCH] build: try libucontext if symbols are not present
-
-Musl includes uncontext.h but doesn't implement the symbols. This means
-that HAVE_CONTEXT_H will be set and linking will fail due to missing
-symbols.
-
-https://wiki.musl-libc.org/open-issues.html#ucontext.h
-
-If the symbols are missing depend on libucontext which is an implementation
-of these functions for musl.
-
-https://github.com/kaniini/libucontext
-
-Bug: https://bugs.gentoo.org/928892
-Signed-off-by: Alfred Wingate <parona@protonmail.com>
---- a/meson.build
-+++ b/meson.build
-@@ -44,14 +44,14 @@ if get_option('sysprof')
-   config_h.set10('HAVE_SYSPROF', true)
- endif
- 
--check_headers = [
--  'ucontext.h',
--]
--foreach h : check_headers
--  if cc.has_header(h)
--    config_h.set('HAVE_' + h.underscorify().to_upper(), 1)
-+if cc.has_header('ucontext.h')
-+  if not cc.has_function('makecontext', prefix : '#include <ucontext.h>')
-+    libucontext_dep = dependency('libucontext', required: false)
-+  else
-+    libucontext_dep = disabler()
-   endif
--endforeach
-+  config_h.set('HAVE_UCONTEXT_H', 1)
-+endif
- 
- if host_machine.system() == 'darwin'
-   # known alignment for darwin where we're using helpers
---- a/src/meson.build
-+++ b/src/meson.build
-@@ -95,6 +95,9 @@ if host_machine.system() != 'windows'
-     'dex-unix-signal.c',
-     'dex-ucontext.c',
-   ]
-+  if libucontext_dep.found()
-+    libdex_deps += [libucontext_dep]
-+  endif
- 
-   # If we're on Linux and mips we might still need asm.S.
-   # But otherwise linux can do it all without any custom
--- 
-GitLab
-