Remove manual dependency on LWP::Protocol::PSGI

[skip ci]

cpanfile

@@ -34,7 +34,6 @@ on 'test' => sub {
   requires "File::stat" => "0";
   requires "FindBin" => "0";
   requires "IO::Socket::INET" => "0";
-  requires "LWP::Protocol::PSGI" => "0.04";
   requires "LWP::Simple" => "0";
   requires "Test::Exception" => "0";
   requires "Test::LWP::UserAgent" => "0";

dist.ini

@@ -71,10 +71,6 @@ copy = cpanfile
 perl = 5.010
 Moo = 1.005
 
-[Prereqs / TestRequires]
-; unfortunately this doesn't coerce 0.04, it just sets the minimum.
-LWP::Protocol::PSGI = 0.04
-
 [MetaResources]
 bugtracker.web = https://github.com/gempesaw/Selenium-Remote-Driver/issues
 repository.type = git