libchromeos: Remove touchscreen calibration workaround for rush_ryu

This is no longer needed in the latest version of device.

cherry-picked from
https://chromium-review.googlesource.com/#/c/239261/

BUG=chrome-os-partner:32041
TEST=manual on rush_ryu

Change-Id: I70079bdc8f65ee9e6401a3c2839ab38ea5458fcd
Reviewed-on: https://chromium-review.googlesource.com/239941
Reviewed-by: Dan Erat <derat@chromium.org>
Commit-Queue: Yufeng Shen <miletus@google.com>
Tested-by: Yufeng Shen <miletus@google.com>
diff --git a/libchromeos/chromeos/ui/chromium_command_builder.cc b/libchromeos/chromeos/ui/chromium_command_builder.cc
index f50b2c2..664424e 100644
--- a/libchromeos/chromeos/ui/chromium_command_builder.cc
+++ b/libchromeos/chromeos/ui/chromium_command_builder.cc
@@ -482,14 +482,6 @@
       IsBoard("nyan_blaze"))
     AddArg("--ignore-resolution-limits-for-accelerated-video-decode");
 
-  if (IsBoard("rush_ryu")) {
-    // Workaround for wrong bounds from touchscreen firmware.
-    AddArg("--touch-calibration=0,-1511,0,-1069");
-
-    // Workaround for lack of highdpi detection in athena.
-    AddArg("--force-device-scale-factor=2");
-  }
-
   // Ozone platform configuration.
   if ((IsBoard("link_freon") || IsBoard("peppy_freon") ||
        IsBoard("zako_freon")) && UseFlagIsSet("ozone_platform_gbm")) {