knitr 1.36 release fixes: yihui/knitr#2052

Author: t-kalinowski

.github/workflows/R-CMD-check.yaml

@@ -117,9 +117,6 @@ jobs:
       - name: Install rcmdcheck
         run: remotes::install_cran("rcmdcheck")
 
-      - name: Workaround knitr regression
-        run: if(getRversion() < "3.5") remotes::install_version("knitr", "1.30")
-
       - name: Check
         run: rcmdcheck::rcmdcheck(args = '--no-manual', error_on = 'warning', check_dir = 'check')