Fix msf/core and self.class msftidy warnings

Also fixed rex requires.

modules/exploits/windows/browser/java_codebase_trust.rb

@@ -3,9 +3,6 @@
 # Current source: https://github.com/rapid7/metasploit-framework
 ##
 
-require 'msf/core'
-require 'rex'
-
 class MetasploitModule < Msf::Exploit::Remote
   Rank = ExcellentRanking
 
@@ -80,7 +77,7 @@ class MetasploitModule < Msf::Exploit::Remote
         # This is the default for a 32-bit Windows install
         OptString.new('LIBPATH', [ false,  "The codebase path to use (privileged)",
           "C:\\Program Files\\java\\jre6\\lib\\ext"]),
-      ], self.class)
+      ])
   end
 
   def exploit