Update r-cmd-check.yml to fix Ubuntu problems

.github/workflows/r-cmd-check.yml

@@ -35,8 +35,6 @@ jobs:
           - {os: macOS-latest, r: 'devel'}
           - {os: ubuntu-latest, r: 'release'}
           - {os: ubuntu-latest, r: 'devel'}
-          #- {os: ubuntu-20.04, r: 'release'}
-          #- {os: ubuntu-20.04, r: 'devel'}
 
     env:
       R_REMOTES_NO_ERRORS_FROM_WARNINGS: true
@@ -52,36 +50,16 @@ jobs:
 
       - uses: r-lib/actions/setup-pandoc@v2
 
-      - name: Query dependencies
-        run: |
-          install.packages('remotes')
-          saveRDS(remotes::dev_package_deps(dependencies = TRUE), ".github/depends.Rds", version = 2)
-          writeLines(sprintf("R-%i.%i", getRversion()$major, getRversion()$minor), ".github/R-version")
-        shell: Rscript {0}
-
-      - name: Cache R packages
-        if: runner.os != 'Windows'
-        uses: actions/cache@v4
-        with:
-          path: ${{ env.R_LIBS_USER }}
-          key: ${{ runner.os }}-${{ hashFiles('.github/R-version') }}-1-${{ hashFiles('.github/depends.Rds') }}
-          restore-keys: ${{ runner.os }}-${{ hashFiles('.github/R-version') }}-1-
-
       - name: Install system dependencies
         if: runner.os == 'Linux'
         env:
           RHUB_PLATFORM: linux-x86_64-ubuntu-gcc
         run: |
-          Rscript -e "remotes::install_github('r-hub/sysreqs')"
-          sysreqs=$(Rscript -e "cat(sysreqs::sysreq_commands('DESCRIPTION'))")
-          sudo -s eval "$sysreqs"
-          wget http://security.ubuntu.com/ubuntu/pool/main/i/icu/libicu66_66.1-2ubuntu2.1_amd64.deb
-          sudo dpkg -i libicu66_66.1-2ubuntu2.1_amd64.deb
-          rm libicu66_66.1-2ubuntu2.1_amd64.deb
           sudo apt-get install libcurl4-openssl-dev libicu-dev texlive-latex-base
 
       - name: Install dependencies
-        run: |
+        run: |
+					install.packages("remotes")
           remotes::install_deps(dependencies = TRUE)
           remotes::install_cran("rcmdcheck")
           remotes::install_cran("covr")