Remove unused 'rack-proxy' dependency

Convert 'rack' to implicit dependency (of actionpack) instead of listing 
it explicitly

Gemfile

@@ -1,8 +1,6 @@
 source "http://rubygems.org"
 
 gem 'actionpack'
-gem 'rack'
-gem 'rack-proxy'
 gem 'addressable'
 
 # Add dependencies to develop your gem here.

Gemfile.lock

@@ -70,8 +70,6 @@ GEM
       rack (>= 1.2, < 3)
     public_suffix (2.0.5)
     rack (1.6.5)
-    rack-proxy (0.5.17)
-      rack
     rack-test (0.6.3)
       rack (>= 1.0)
     rails-deprecated_sanitizer (1.0.3)
@@ -109,8 +107,6 @@ DEPENDENCIES
   addressable
   bundler (~> 1.0)
   jeweler (~> 2.1.2)
-  rack
-  rack-proxy
   rdoc (~> 3.12)
   shoulda
   simplecov

lib/reverse_proxy/client.rb

@@ -1,5 +1,4 @@
 require 'rack'
-require 'rack-proxy'
 require 'addressable/uri'
 
 module ReverseProxy

rails-reverse-proxy.gemspec

@@ -43,8 +43,6 @@ Gem::Specification.new do |s|
 
     if Gem::Version.new(Gem::VERSION) >= Gem::Version.new('1.2.0') then
       s.add_runtime_dependency(%q<actionpack>.freeze, [">= 0"])
-      s.add_runtime_dependency(%q<rack>.freeze, [">= 0"])
-      s.add_runtime_dependency(%q<rack-proxy>.freeze, [">= 0"])
       s.add_runtime_dependency(%q<addressable>.freeze, [">= 0"])
       s.add_development_dependency(%q<shoulda>.freeze, [">= 0"])
       s.add_development_dependency(%q<rdoc>.freeze, ["~> 3.12"])
@@ -53,8 +51,6 @@ Gem::Specification.new do |s|
       s.add_development_dependency(%q<simplecov>.freeze, [">= 0"])
     else
       s.add_dependency(%q<actionpack>.freeze, [">= 0"])
-      s.add_dependency(%q<rack>.freeze, [">= 0"])
-      s.add_dependency(%q<rack-proxy>.freeze, [">= 0"])
       s.add_dependency(%q<addressable>.freeze, [">= 0"])
       s.add_dependency(%q<shoulda>.freeze, [">= 0"])
       s.add_dependency(%q<rdoc>.freeze, ["~> 3.12"])
@@ -64,8 +60,6 @@ Gem::Specification.new do |s|
     end
   else
     s.add_dependency(%q<actionpack>.freeze, [">= 0"])
-    s.add_dependency(%q<rack>.freeze, [">= 0"])
-    s.add_dependency(%q<rack-proxy>.freeze, [">= 0"])
     s.add_dependency(%q<addressable>.freeze, [">= 0"])
     s.add_dependency(%q<shoulda>.freeze, [">= 0"])
     s.add_dependency(%q<rdoc>.freeze, ["~> 3.12"])