build: drop support for 32-bit windows target

.github/workflows/depends.yml

@@ -38,9 +38,6 @@ jobs:
           - name: "ARM v8"
             host: "aarch64-linux-gnu"
             packages: "python3 gperf g++-aarch64-linux-gnu"
-          - name: "i686 Win"
-            host: "i686-w64-mingw32"
-            packages: "python3 g++-mingw-w64-i686"
           - name: "i686 Linux"
             host: "i686-pc-linux-gnu"
             packages: "gperf cmake g++-multilib python3-zmq"
@@ -96,7 +93,7 @@ jobs:
     - name: install dependencies
       run: sudo apt update; sudo apt -y install build-essential libtool cmake autotools-dev automake pkg-config bsdmainutils curl git ca-certificates ccache ${{ matrix.toolchain.packages }}
     - name: prepare w64-mingw32
-      if: ${{ matrix.toolchain.host == 'x86_64-w64-mingw32' || matrix.toolchain.host == 'i686-w64-mingw32' }}
+      if: ${{ matrix.toolchain.host == 'x86_64-w64-mingw32' }}
       run: |
         sudo update-alternatives --set ${{ matrix.toolchain.host }}-g++ $(which ${{ matrix.toolchain.host }}-g++-posix)
         sudo update-alternatives --set ${{ matrix.toolchain.host }}-gcc $(which ${{ matrix.toolchain.host }}-gcc-posix)

contrib/gitian/gitian-win.yml

@@ -22,12 +22,6 @@ packages:
 - "python"
 - "cmake"
 alternatives:
--
-  package: "i686-w64-mingw32-g++"
-  path: "/usr/bin/i686-w64-mingw32-g++-posix"
--
-  package: "i686-w64-mingw32-gcc"
-  path: "/usr/bin/i686-w64-mingw32-gcc-posix"
 -
   package: "x86_64-w64-mingw32-g++"
   path: "/usr/bin/x86_64-w64-mingw32-g++-posix"
@@ -40,7 +34,7 @@ remotes:
 files: []
 script: |
   WRAP_DIR=$HOME/wrapped
-  HOSTS="i686-w64-mingw32 x86_64-w64-mingw32"
+  HOSTS="x86_64-w64-mingw32"
   FAKETIME_HOST_PROGS="windres objcopy"
   FAKETIME_PROGS="date zip"
   HOST_CFLAGS="-O2 -g"