Delete typo

lib/msf/core/exploit/powershell.rb

@@ -147,7 +147,6 @@ module Exploit::Powershell
   # @param ps_code [String] Powershell code
   # @param payload_arch [String] The payload architecture 'x86'/'x86_64'
   # @param encoded [Boolean] Indicates whether ps_code is encoded or not
-  #ex
   # @return [String] Wrapped powershell code
   def run_hidden_psh(ps_code, payload_arch, encoded)
     arg_opts = {