Update rspec files

Remove some junk code

spec/lib/rex/exploitation/javascriptaddonsdetect_spec.rb

@@ -2,10 +2,6 @@ require 'rex/exploitation/javascriptaddonsdetect'
 
 describe Rex::Exploitation::JavascriptAddonsDetect do
 
-  subject(:ropdb) do
-    described_class.new
-  end
-
   context "Class methods" do
 
     context ".initialize" do

spec/lib/rex/exploitation/javascriptexploitation_spec.rb

@@ -2,10 +2,6 @@ require 'rex/exploitation/javascriptexploitation'
 
 describe Rex::Exploitation::JavascriptExploitation do
 
-  subject(:ropdb) do
-    described_class.new
-  end
-
   context "Class methods" do
 
     context ".mstime_malloc" do

spec/lib/rex/exploitation/javascriptnetwork_spec.rb

@@ -2,10 +2,6 @@ require 'rex/exploitation/javascriptnetwork'
 
 describe Rex::Exploitation::JavascriptNetwork do
 
-  subject(:ropdb) do
-    described_class.new
-  end
-
   context "Class methods" do
 
     context ".ajax_download" do

spec/lib/rex/exploitation/javascriptosdetect_spec.rb

@@ -2,10 +2,6 @@ require 'rex/exploitation/javascriptosdetect'
 
 describe Rex::Exploitation::JavascriptOSDetect do
 
-  subject(:ropdb) do
-    described_class.new
-  end
-
   context "Class methods" do
 
     context ".initialize" do

spec/lib/rex/exploitation/javascriptutils_spec.rb

@@ -2,10 +2,6 @@ require 'rex/exploitation/javascriptutils'
 
 describe Rex::Exploitation::JavascriptUtils do
 
-  subject(:ropdb) do
-    described_class.new
-  end
-
   context "Class methods" do
 
     context ".base64" do