dev-vcs/mercurial: remove unused patch

Signed-off-by: Michael Mair-Keimberger <mmk@levelnine.at>
Signed-off-by: Conrad Kostecki <conikost@gentoo.org>

dev-vcs/mercurial/files/mercurial-6.3.2-setup-rust-makedirs.patch

@@ -1,30 +0,0 @@
-# HG changeset patch
-# User Cédric Krier <ced@b2ck.com>
-# Date 1674932937 -3600
-#      Sat Jan 28 20:08:57 2023 +0100
-# Node ID 65a97b8b1268169fecc21749b7472fd155bfb399
-# Parent  a1123772333204cbeb766b17de8089a1d13d4a68
-# EXP-Topic setup-rust-build-makedirs-target
-Ensure target directory exists with building rust extension
-
-When the rust extension is the first to be build, the target directory may not
-exist so the copy fails.
-
-diff --git a/setup.py b/setup.py
---- a/setup.py
-+++ b/setup.py
-@@ -1454,11 +1454,13 @@ class RustStandaloneExtension(RustExtens
-         target = [target_dir]
-         target.extend(self.name.split('.'))
-         target[-1] += DYLIB_SUFFIX
-+        target = os.path.join(*target)
-+        os.makedirs(os.path.dirname(target), exist_ok=True)
-         shutil.copy2(
-             os.path.join(
-                 self.rusttargetdir, self.dylibname + self.rustdylibsuffix()
-             ),
--            os.path.join(*target),
-+            target,
-         )
- 
-