Do not zip artifacts ourselves

GitHub does it, this creates zips of zips...

.github/workflows/testing.yml

@@ -26,153 +26,16 @@ jobs:
           sudo make install -j Q=
       - name: Package binaries
         run: |
-          tar -Jcf rgbds-canary-${{ matrix.os }}-${{ matrix.cc }}-bins.tar.xz rgb{asm,link,fix,gfx}
+          mkdir $DIST_DIR
+          cp rgb{asm,link,fix,gfx} $DIST_DIR
+        env:
+          DIST_DIR: rgbds-canary-${{ matrix.os }}-${{ matrix.cc }}-bins
       - name: Upload binaries
         uses: actions/upload-artifact@v1
         with:
           name: rgbds-canary-${{ matrix.os }}-${{ matrix.cc }}-bins
-          path: rgbds-canary-${{ matrix.os }}-${{ matrix.cc }}-bins.tar.xz
+          path: rgbds-canary-${{ matrix.os }}-${{ matrix.cc }}-bins
       - name: Test
         shell: bash
         run: |
           test/run-tests.sh
-
-  windows-build:
-    strategy:
-      matrix:
-        bits: [32, 64]
-        os: [ubuntu-latest]
-        include:
-          - bits: 32
-            arch: i686
-          - bits: 64
-            arch: x86-64
-    runs-on: ${{ matrix.os }}
-    env:
-      DIST_DIR: win${{ matrix.bits }}
-    steps:
-      - uses: actions/checkout@v2
-      - name: Install deps
-        shell: bash
-        run: |
-          ./.github/actions/install_deps.sh ${{ matrix.os }}
-      - name: Install MinGW
-        run: |
-          sudo apt-get install gcc-mingw-w64-${{ matrix.arch }} mingw-w64-tools libz-mingw-w64-dev
-      - name: Install libpng dev headers for MinGW
-        run: |
-          sudo ./.github/actions/mingw-w64-libpng-dev.sh ${{ matrix.arch }}
-      - name: Build Windows binaries
-        run: |
-          make mingw${{ matrix.bits }} -j Q=
-          mv rgbasm rgbasm.exe
-          mv rgblink rgblink.exe
-          mv rgbfix rgbfix.exe
-          mv rgbgfx rgbgfx.exe
-      - name: Package binaries
-        run: |
-          mkdir $DIST_DIR
-          mv *.exe $DIST_DIR
-          zip -r ${DIST_DIR}-bins.zip $DIST_DIR
-      - name: Upload binaries
-        uses: actions/upload-artifact@v1
-        with:
-          name: win${{ matrix.bits }}-bins
-          path: win${{ matrix.bits }}-bins.zip
-
-  dll-build:
-    runs-on: windows-2019
-    strategy:
-      matrix:
-        bits: [32, 64]
-        include:
-          - bits: 32
-            vcvars: x86
-          - bits: 64
-            vcvars: x86_amd64
-    steps:
-      - name: Download and validate sources
-        shell: pwsh
-        run: |
-          $files = @(
-            @{
-              Name = "zlib1211.zip"
-              Hash = "d7510a8ee1918b7d0cad197a089c0a2cd4d6df05fee22389f67f115e738b178d"
-              URI = "http://www.zlib.net/zlib1211.zip"
-            }
-            @{
-              Name = "lpng1637.zip"
-              Hash = "3b4b1cbd0bae6822f749d39b1ccadd6297f05e2b85a83dd2ce6ecd7d09eabdf2"
-              URI = "https://download.sourceforge.net/libpng/lpng1637.zip"
-            }
-          )
-
-          $client = New-Object Net.WebClient
-          foreach ($file in $files) {
-            $client.DownloadFile($file.URI, $file.Name)
-            $hash = Get-FileHash -Algorithm SHA256 -Path $file.Name
-            if ($hash.Hash.ToLowerInvariant() -ne $file.Hash) {throw $($file.Name + " mismatch: " + $hash.Hash.ToLowerInvariant() + " != " + $file.Hash)}
-          }
-      - name: Build zlib
-        shell: cmd
-        run: |
-          7z x zlib1211.zip
-          move zlib-1.2.11 zlib
-          cd zlib
-          call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" ${{ matrix.vcvars }}
-          nmake -f win32/Makefile.msc all testdll
-          copy zlib1.dll ../zlib1.dll
-      - name: Build libpng
-        shell: cmd
-        run: |
-          mingw-get install mingw-get
-          7z x lpng1637.zip
-          move lpng1637 libpng
-          cd libpng
-          call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" ${{ matrix.vcvars }}
-          cp scripts/pnglibconf.h.prebuilt pnglibconf.h
-          cp scripts/makefile.vcwin32 makefile
-          nmake test ZLIBLIB=.. ZLIBINC=../zlib CPPFLAGS=-I../zlib LDFLAGS=-L..
-          nmake install
-          copy libpng16.dll ../libpng16.dll
-      - name: Package DLLs
-        run: |
-          7z a dlls.zip *.dll
-      - name: Upload DLLs
-        uses: actions/upload-artifact@v1
-        with:
-          name: dlls${{ matrix.bits }}
-          path: dlls${{ matrix.bits }}.zip
-
-  windows-testing:
-    needs: [windows-build, dll-build]
-    strategy:
-      matrix:
-        bits: [32, 64]
-    runs-on: windows-2019
-    steps:
-      - uses: actions/checkout@v2
-      - name: Retrieve binaries
-        uses: actions/download-artifact@v1
-        with:
-          name: win${{ matrix.bits }}-bins
-      - name: Retrieve DLLs
-        uses: actions/download-artifact@v1
-        with:
-          name: dlls${{ matrix.bits }}
-      - name: Extract
-        run: |
-          7z e win${{ matrix.bits }}-bins.zip
-          7z e dlls${{ matrix.bits }}.zip
-      - name: Package Windows release
-        run: |
-          7z a rgbds-canary-win${{ matrix.bits }}.zip *.exe *.dll
-      - name: Upload Windows release
-        uses: actions/upload-artifact@v1
-        with:
-          name: rgbds-canary-win${{ matrix.bits }}
-          path: rgbds-canary-win${{ matrix.bits }}.zip
-      - name: Run tests
-        shell: bash
-        run: |
-          test/run-tests.sh