Remove unused dependency from RemoteConnection

cpanfile

@@ -22,7 +22,6 @@ requires "List::MoreUtils" => "0";
 requires "MIME::Base64" => "0";
 requires "Moo" => "1.005";
 requires "Moo::Role" => "0";
-requires "Net::Ping" => "0";
 requires "Scalar::Util" => "0";
 requires "Sub::Install" => "0";
 requires "Test::Builder" => "0";

lib/Selenium/Remote/RemoteConnection.pm

@@ -7,7 +7,6 @@ use Try::Tiny;
 use LWP::UserAgent;
 use HTTP::Headers;
 use HTTP::Request;
-use Net::Ping;
 use Carp qw(croak);
 use JSON;
 use Data::Dumper;