gdk-pixbuf: drop static-lerc.patch

This is no longer necessary since static libtiff no longer links with
lerc.

pkgs/development/libraries/gdk-pixbuf/default.nix

@@ -53,7 +53,6 @@ stdenv.mkDerivation (finalAttrs: {
     ./installed-tests-path.patch
 
     ./static-deps.patch
-    ./static-lerc.patch
   ];
 
   # gdk-pixbuf-thumbnailer is not wrapped therefore strictDeps will work

pkgs/development/libraries/gdk-pixbuf/static-lerc.patch

@@ -1,79 +0,0 @@
-From 3bca69d889fe545dda4ed9a8fab8ff3fe38ba487 Mon Sep 17 00:00:00 2001
-From: Alyssa Ross <hi@alyssa.is>
-Date: Wed, 5 Feb 2025 19:37:27 +0100
-Subject: [PATCH] build: fix linking with libtiff with lerc support
-
-Lerc is written in C++.  When C and C++ objects are linked, a C++
-linker should be used to ensure C++-specific things are correctly
-handled.  See e.g. this comment in the Meson source for reference[1].
-One symptom of using a C linker to link with C++ objects is that
-libstdc++ won't be linked when building static executables, causing
-link failures.
-
-Unfortunately, Meson does not know whether dependencies found by
-pkg-config are C++, and therefore require a C++ linker, so we have to
-tell it ourselves to use a C++ linker.  There's no way to check
-whether libtiff is built with Lerc support, so we always use a C++
-linker if one is available and libtiff support is enabled.  If a C++
-linker ends up being used to link only C objects, it shouldn't do any
-harm.
-
-[1]: https://github.com/mesonbuild/meson/blob/9fd5281befe7881c9d1210c9e6865382bc0f2b08/mesonbuild/build.py#L1558-L1565
----
-Link: https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/merge_requests/181
-
- gdk-pixbuf/meson.build | 6 ++++++
- meson.build            | 6 ++++++
- 2 files changed, 12 insertions(+)
-
-diff --git a/gdk-pixbuf/meson.build b/gdk-pixbuf/meson.build
-index 570625bfe..5cc11355f 100644
---- a/gdk-pixbuf/meson.build
-+++ b/gdk-pixbuf/meson.build
-@@ -333,6 +333,11 @@ gdkpixbuf_bin = [
-   [ 'gdk-pixbuf-query-loaders', [ 'queryloaders.c' ] ],
- ]
- 
-+bin_link_language = 'c'
-+if loaders_cpp
-+  bin_link_language = 'cpp'
-+endif
-+
- foreach bin: gdkpixbuf_bin
-   bin_name = bin[0]
-   bin_source = bin.get(1, bin_name + '.c')
-@@ -342,6 +347,7 @@ foreach bin: gdkpixbuf_bin
-                    dependencies: gdk_pixbuf_deps + [ gdkpixbuf_dep ],
-                    include_directories: [ root_inc, gdk_pixbuf_inc ],
-                    c_args: common_cflags + gdk_pixbuf_cflags,
-+                   link_language : bin_link_language,
-                    install: true)
-   meson.override_find_program(bin_name, bin)
- 
-diff --git a/meson.build b/meson.build
-index f0d4812f4..31b3197fc 100644
---- a/meson.build
-+++ b/meson.build
-@@ -345,6 +345,8 @@ endif
- 
- # Don't check and build the tiff loader if native_windows_loaders is true
- tiff_opt = get_option('tiff')
-+tiff_dep = dependency('', required: false)
-+loaders_cpp = false
- if not tiff_opt.disabled() and not native_windows_loaders
-   # We currently don't have a fallback subproject, but this handles error
-   # reporting if tiff_opt is enabled.
-@@ -353,6 +355,10 @@ if not tiff_opt.disabled() and not native_windows_loaders
-   if tiff_dep.found()
-     enabled_loaders += 'tiff'
-     loaders_deps += tiff_dep
-+
-+    # If libtiff is built with LERC support, it should be linked with
-+    # a C++ linker.
-+    loaders_cpp = loaders_cpp or add_languages('cpp', required: false, native: false)
-   endif
- endif
- 
--- 
-GitLab
-