Remove outdated information for shinyApp()

man/shinyApp.Rd

@@ -78,9 +78,7 @@ to \code{\link[=runApp]{runApp()}} will run the app.
 \description{
 These functions create Shiny app objects from either an explicit UI/server
 pair (\code{shinyApp}), or by passing the path of a directory that contains a
-Shiny app (\code{shinyAppDir}). You generally shouldn't need to use these
-functions to create/run applications; they are intended for interoperability
-purposes, such as embedding Shiny apps inside a \pkg{knitr} document.
+Shiny app (\code{shinyAppDir}).
 }
 \details{
 Normally when this function is used at the R console, the Shiny app object is