Free some disk space

.github/workflows/main.yml

@@ -9,7 +9,7 @@ jobs:
   build:
     strategy:
       matrix:
-        OMR_TARGET: [bpi-r2, bpi-r64, rpi2, rpi4, wrt32x, espressobin, r2s, rpi3, wrt3200acm, x86, x86_64]  
+        OMR_TARGET: [bpi-r2, bpi-r64, rpi2, rpi4, wrt32x, espressobin, r2s, rpi3, wrt3200acm, x86, x86_64]
     runs-on: ubuntu-latest
     continue-on-error: true
 
@@ -25,6 +25,12 @@ jobs:
       run: |
         sudo apt-get update
         sudo apt-get install build-essential asciidoc binutils bzip2 gawk gettext git libncurses5-dev libz-dev patch unzip zlib1g-dev lib32gcc1 libc6-dev-i386 subversion flex uglifyjs git-core gcc-multilib p7zip p7zip-full msmtp libssl-dev texinfo libglib2.0-dev xmlto qemu-utils upx libelf-dev autoconf automake libtool autopoint device-tree-compiler
+    - name: Free disk space
+      run: |
+        sudo apt-get autoremove -y >/dev/null 2>&1
+        sudo apt-get autoclean -y >/dev/null 2>&1
+        sudo rm -rf /usr/local/lib/android >/dev/null 2>&1
+        docker rmi $(docker image ls -aq) >/dev/null 2>&1
     - name: Clone source code
       working-directory: ../../
       env: