Revert "Implement wait_for_network_idle"

This reverts commit 2945c6c.

Author: route

lib/capybara/cuprite/driver.rb

@@ -285,10 +285,6 @@ def clear_cookies
       browser.cookies.clear
     end
 
-    def wait_for_network_idle(**options)
-      browser.network.wait_for_idle(**options)
-    end
-
     def clear_memory_cache
       browser.network.clear(:cache)
     end

spec/spec_helper.rb

@@ -17,9 +17,8 @@
   options.merge!(inspector: true) if ENV["INSPECTOR"]
   options.merge!(logger: StringIO.new)
   driver = Capybara::Cuprite::Driver.new(app, options)
-  process = driver.browser.process
-  puts process.command.to_a.join(" ")
-  puts process.browser_version
+  puts driver.browser.process.cmd.join(" ")
+  puts `"#{driver.browser.process.path}" -version --headless --no-gpu`
   driver
 end