remove some unneeded functions

internal/engine.cm

@@ -83,12 +83,6 @@ function use_core(path) {
 
 var blob = use_core('blob')
 
-// Capture Object and Array methods before they're deleted
-Object.prototype.toString = function()
-{
-  return json.encode(this)
-}
-
 globalThis.actor = function()
 {
 
@@ -348,7 +342,7 @@ function guid(bits = 256)
   return text(guid,'h')
 }
 
-var HEADER = key()
+var HEADER = {}
 
 // takes a function input value that will eventually be called with the current time in number form.
 $_.clock = function(fn) {