dev-db/mysql: remove unused patch

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

dev-db/mysql/files/mysql-8.0.43-fix-clang-20-allocator.patch

@@ -1,56 +0,0 @@
-https://github.com/mysql/mysql-server/commit/f5b7993d23fe93dd417160d7bbc19c20050b2ffe
-
-From f5b7993d23fe93dd417160d7bbc19c20050b2ffe Mon Sep 17 00:00:00 2001
-From: Tor Didriksen <tor.didriksen@oracle.com>
-Date: Wed, 2 Jul 2025 12:15:06 +0200
-Subject: [PATCH] Bug#38142283 Compile MySQL with clang 20 [allocator noclose]
-
-Clang on Linux normally uses STL headers/libraries from gcc.  There is
-evidently some mismatch of template instantiations, and build break
-for the default CTOR ut::allocator::allocator().
-
-include/c++/15/bits/hashtable_policy.h:1475:76: error:
-chosen constructor is explicit in copy-initialization
-
-ut0new.h:2200:12: note: explicit constructor declared here
- 2200 |   explicit allocator(PSI_memory_key key = mem_key_std) : Allocator_base(key) {}
-
-The actual problem is strict checking for explicit constructors during
-copy initializations. We have two choices to fix it:
-
-1- Make the allocator declarations explicit.
-2- Create another non-explicit default constructor.
-
-This patch implements alternative 2.
-
-Note: There is no build break for clang when using -stdlib=libc++
-but this is non-standard on Linux.
-
-Change-Id: I02d81329ad5a61309b09d8fc1230b2b7ade8c20c
-(cherry picked from commit f97007197c9f366136c2d27b093ee73fda0581e0)
-(cherry picked from commit 0e66e10f29aa6f328b790132b82e90f55bc764c4)
-
-diff --git a/storage/innobase/include/ut0new.h b/storage/innobase/include/ut0new.h
-index 859c556f73a..295067ede24 100644
---- a/storage/innobase/include/ut0new.h
-+++ b/storage/innobase/include/ut0new.h
-@@ -2193,10 +2193,14 @@ class allocator : public Allocator_base {
-                 "ut::allocator does not support over-aligned types. Use "
-                 "ut::aligned_* API to handle such types.");
- 
--  /** Default constructor.
-+  /** Default constructor, use mem_key_std.
-+   */
-+  allocator() : Allocator_base(mem_key_std) {}
-+
-+  /** Explicit constructor.
-       @param[in] key  performance schema key.
-     */
--  explicit allocator(PSI_memory_key key = mem_key_std) : Allocator_base(key) {}
-+  explicit allocator(PSI_memory_key key) : Allocator_base(key) {}
- 
-   /* Rule-of-five */
-   allocator(const allocator<T, Allocator_base> &) = default;
--- 
-2.49.1
-