Remove ext/avm.cmd (#2820)

CHANGELOG.md

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4cfb3ea..e2f463f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,7 +13,12 @@
 * Set avifDecoder::image->depth to the same value after avifDecoderParse() as
   after avifDecoderNextImage() when AVIF_ENABLE_EXPERIMENTAL_SAMPLE_TRANSFORM is
   enabled and when the file to decode contains a 'sato' derived image item.
-* Update rav1e.cmd/LocalRav1e.cmake: cargo-c v0.10.13, corrosion v0.5.2, rav1e v0.8.0
+* Update rav1e.cmd/LocalRav1e.cmake: cargo-c v0.10.13, corrosion v0.5.2,
+  rav1e v0.8.0
+
+### Removed since 1.3.0
+
+* Remove ext/avm.cmd.
 
 ## [1.3.0] - 2025-05-09
 

ext/avm.cmd

diff --git a/ext/avm.cmd b/ext/avm.cmd
deleted file mode 100755
index 889b1a5..0000000
--- a/ext/avm.cmd
+++ /dev/null
@@ -1,14 +0,0 @@
-: # If you want to use a local build of libavm, you must clone the avm repo in this directory first, then set CMake's AVIF_CODEC_AVM to LOCAL.
-: # The git SHA below is known to work, and will occasionally be updated. Feel free to use a more recent commit.
-
-: # The odd choice of comment style in this file is to try to share this script between *nix and win32.
-
-: # cmake and ninja must be in your PATH.
-
-: # If you're running this on Windows, be sure you've already run this (from your VC2019 install dir):
-: #     "C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Auxiliary\Build\vcvars64.bat"
-
-git clone -b research-v9.0.0 --depth 1 https://gitlab.com/AOMediaCodec/avm.git
-
-cmake -G Ninja -S avm -B avm/build.libavif -DBUILD_SHARED_LIBS=OFF -DCONFIG_PIC=1 -DCMAKE_BUILD_TYPE=Release -DENABLE_DOCS=0 -DENABLE_EXAMPLES=0 -DENABLE_TESTS=0 -DENABLE_TOOLS=0
-cmake --build avm/build.libavif --config Release --parallel