remove cache R dependencies

removes deprecated v2

Author: MargaretSiple-NOAA

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

@@ -47,14 +47,6 @@ jobs:
           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@v2
-        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 dependencies
         run: |
           remotes::install_deps(dependencies = TRUE)