Drop the Windows host nobody ships

i686-w64-mingw32 was declared `packaged: false`, which is describe's way
of saying it does not go in a release, and it is nobody's build machine
either -- so prune_hosts has been leaving it out of every lock since the
lock existed. No snapshot has ever carried it: forty releases of
vitasdk/autobuilds, none with an i686 asset.

What kept building it was the hand-written matrix, which uploaded
vitasdk-windows-i686 and then had no job download it. It expired
fourteen days later, every run, unread.

So this is not a host being retired; it is a row, a toolchain file and a
build recipe that describe stopped honouring a while ago. The lock is
ten hosts before this commit and ten after.

Author: frangarcj

README.md

@@ -200,7 +200,6 @@ Available host toolchain files under `cmake/toolchains/`:
 | File | Host | Notes |
 | --- | --- | --- |
 | `x86_64-w64-mingw32.cmake` | Windows x86_64 | mingw-w64 |
-| `i686-w64-mingw32.cmake` | Windows i686 | mingw-w64 |
 | `aarch64-linux-gnu.cmake` | Linux aarch64 (glibc) | alternative to a native arm64 build |
 | `x86_64-unknown-freebsd.cmake` | FreeBSD x86_64 | clang + base.txz sysroot, see `scripts/setup-freebsd-cross.sh` |
 | `aarch64-unknown-freebsd.cmake` | FreeBSD aarch64 | clang + base.txz sysroot, see `scripts/setup-freebsd-cross.sh` |

cmake/hosts.json

@@ -8,7 +8,6 @@
     {"name": "aarch64-linux-musl", "stage": 2, "runner": "ubuntu-24.04-arm", "container": null, "packaged": true},
     {"name": "x86_64-w64-mingw32", "stage": 3, "runner": "ubuntu-24.04", "container": null, "packaged": true, "build_host": "x86_64-linux-gnu"},
     {"name": "x86_64-apple-darwin", "stage": 3, "runner": "macos-14", "container": null, "packaged": true, "build_host": "arm64-apple-darwin"},
-    {"name": "i686-w64-mingw32", "stage": 3, "runner": "ubuntu-24.04", "container": null, "packaged": false, "build_host": "x86_64-linux-gnu"},
     {"name": "x86_64-unknown-freebsd", "stage": 3, "runner": "ubuntu-24.04", "container": null, "packaged": true, "build_host": "x86_64-linux-gnu"},
     {"name": "aarch64-unknown-freebsd", "stage": 3, "runner": "ubuntu-24.04", "container": null, "packaged": true, "build_host": "x86_64-linux-gnu"}
   ]

cmake/toolchains/i686-w64-mingw32.cmake

@@ -319,7 +319,6 @@ install_dependencies() {
 		local -a extra=()
 		case $host in
 		x86_64-w64-mingw32) extra=(g++-mingw-w64-x86-64) ;;
-		i686-w64-mingw32) extra=(g++-mingw-w64-i686) ;;
 		x86_64-unknown-freebsd | aarch64-unknown-freebsd) extra=(clang lld llvm) ;;
 		esac
 		${sudo_cmd[@]+"${sudo_cmd[@]}"} apt-get update -qq
@@ -393,10 +392,6 @@ x86_64-w64-mingw32)
 	install_dependencies
 	extra_cmake_args+=(-DCMAKE_TOOLCHAIN_FILE="$repo_root/cmake/toolchains/x86_64-w64-mingw32.cmake")
 	;;
-i686-w64-mingw32)
-	install_dependencies
-	extra_cmake_args+=(-DCMAKE_TOOLCHAIN_FILE="$repo_root/cmake/toolchains/i686-w64-mingw32.cmake")
-	;;
 x86_64-unknown-freebsd)
 	install_dependencies
 	scripts/setup-freebsd-cross.sh 14.3 "$PWD/freebsd-cross" x86_64

scripts/ci/build-host.sh

@@ -16,7 +16,7 @@ assert_published(aarch64-unknown-freebsd14 aarch64-unknown-freebsd)
 # Every other host publishes under the triplet it builds with.
 foreach(triplet x86_64-linux-gnu aarch64-linux-gnu x86_64-linux-musl
         aarch64-linux-musl arm64-apple-darwin x86_64-apple-darwin
-        x86_64-w64-mingw32 i686-w64-mingw32)
+        x86_64-w64-mingw32)
     assert_published("${triplet}" "${triplet}")
 endforeach()