Removed declarations of unused variables.

scripts/http-open-proxy.nse

@@ -104,7 +104,6 @@ function default_test(host, port)
   local get_status, head_status, conn_status
   local get_r1, get_r2, get_r3
   local get_cstatus, head_cstatus
-  local _
 
   -- Start test n1 -> google.com
   -- making requests	
@@ -189,14 +188,10 @@ end
 portrule = shortport.port_or_service({8123,3128,8000,8080},{'polipo','squid-http','http-proxy'})
 
 action = function(host, port)
-  local response
-  local i
-  local retval
   local supported_methods = "\nMethods succesfully tested: "
   local fstatus = false
   local def_test = true
   local test_url, pattern
-  local hostname
 
   test_url, pattern = proxy.return_args() 
  
@@ -210,8 +205,7 @@ action = function(host, port)
 
   -- If any of the tests were OK, then the proxy is potentially open
   if fstatus then
-    retval = "Potentially OPEN proxy.\n" .. supported_methods
-    return retval
+    return "Potentially OPEN proxy.\n" .. supported_methods
   elseif not fstatus and supported_methods then
     return supported_methods
   end