revert 7878384 since it does not really help

Author: yihui

NEWS.md

@@ -10,8 +10,6 @@
 
 - Created an option `pagedown.chrome.log` to ease `chrome_print()` debugging: when set to `TRUE`, the logs of Chrome are saved in the working directory.
 
-- In `chrome_print()`, set a timeout when R tries to detect headless Chrome.
-
 - Added support for Sass files with `.scss` and `.sass` extension (thanks, @felipecrp, #244).
 
 ## BUG FIXES

R/chrome.R

@@ -347,7 +347,7 @@ is_remote_protocol_ok = function(debug_port,
   sleep_time = getOption("pagedown.remote.sleeptime", 0.5)
   if (verbose >= 1) message('Trying to find headless Chrome in ', max_attempts, ' attempts')
   for (i in seq_len(max_attempts)) {
-    remote_protocol = xfun::Rscript_call('pagedown:::try_read_json', list(url), timeout = 10)
+    remote_protocol = tryCatch(suppressWarnings(jsonlite::read_json(url)), error = function(e) NULL)
     if (!is.null(remote_protocol)) {
       if (verbose >= 1) message('Headless Chrome found at attempt ', i)
       break

R/utils.R

@@ -38,7 +38,3 @@ run_servr = function() {
   # see https://github.com/rstudio/httpuv/issues/250
   later::with_loop(later::global_loop(), httpuv::service(NA))
 }
-
-try_read_json = function(url) {
-  tryCatch(suppressWarnings(jsonlite::read_json(url)), error = function(e) NULL)
-}