clean up DI transport code (#4583)

Co-authored-by: Oleg Pudeyev <[email protected]>

Author: p-datadog

lib/datadog/di/transport/http.rb

@@ -1,15 +1,9 @@
 # frozen_string_literal: true
 
-require 'uri'
-
-require_relative '../../core/environment/container'
-require_relative '../../core/environment/ext'
-require_relative '../../core/transport/ext'
 require_relative 'diagnostics'
 require_relative 'input'
 require_relative 'http/api'
 require_relative '../../core/transport/http'
-require_relative '../../../datadog/version'
 
 module Datadog
   module DI

lib/datadog/di/transport/http/diagnostics.rb

@@ -38,7 +38,6 @@ def send_diagnostics(env, &block)
               end
             end
 
-            # Endpoint for negotiation
             class Endpoint < Datadog::Core::Transport::HTTP::API::Endpoint
               attr_reader :encoder
 

lib/datadog/di/transport/http/input.rb

@@ -38,7 +38,6 @@ def send_input(env, &block)
               end
             end
 
-            # Endpoint for negotiation
             class Endpoint < Datadog::Core::Transport::HTTP::API::Endpoint
               HEADER_CONTENT_TYPE = 'Content-Type'