remove R.cache message as no longer necessary with #819

Author: lorenzwalthert

README.Rmd

@@ -56,12 +56,6 @@ Or get the development version from GitHub:
 remotes::install_github("r-lib/styler")
 ```
 
-If you don't use styler interactively (i.e. not from the R prompt or RStudio
-Addin), make sure you authorize the R package R.cache once to set up a permanent 
-cache. If you use it interactively, you will be asked to grant this permission 
-once. See `?caching` for details.
-
-
 ## Documentation
 
 The following online docs are available:

README.md

@@ -45,11 +45,6 @@ Or get the development version from GitHub:
 remotes::install_github("r-lib/styler")
 ```
 
-If you don’t use styler interactively (i.e. not from the R prompt or
-RStudio Addin), make sure you authorize the R package R.cache once to
-set up a permanent cache. If you use it interactively, you will be asked
-to grant this permission once. See `?caching` for details.
-
 ## Documentation
 
 The following online docs are available: