[Printing] Clean up job_title field from PrintSettings

Bug: 932759
Change-Id: Ie580c922ccb3a9c1d5e291c3cd13caff81c17515
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1764189Reviewed-by: Vladislav Kuzkokov <vkuzkokov@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Nikita Podguzov <nikitapodguzov@google.com>
Cr-Commit-Position: refs/heads/master@{#689551}

printing/print_settings.cc

@@ -184,7 +184,6 @@ void PrintSettings::Clear() {
 #if defined(OS_CHROMEOS)
   send_user_info_ = false;
   username_.clear();
-  job_title_.clear();
   pin_value_.clear();
 #endif  // defined(OS_CHROMEOS)
 }

printing/print_settings.h

@@ -289,9 +289,6 @@ class PRINTING_EXPORT PrintSettings {
   // Username if it's required by the printer.
   std::string username_;
 
-  // Job title if it's required by the printer.
-  std::string job_title_;
-
   // PIN code entered by the user.
   std::string pin_value_;
 #endif