remove json as a global

benchmarks/nbody.ce

@@ -182,7 +182,7 @@ if (fn_info.locals && fn_info.locals.length > 0) {
 log.console(`  stack_size: ${fn_info.stack_size}`)
 
 // Display disassembly
-log.console(json.encode(js.disassemble(advance)))
+log.console(js.disassemble(advance))
 log.console(js.disassemble(advance).length)
 
 $_.stop()

benchmarks/nota.ce

@@ -1,6 +1,7 @@
 var nota = use('nota')
 var os = use('os')
 var io = use('fd')
+var json = use('json')
 
 var ll = io.slurp('benchmarks/nota.json')
 

benchmarks/wota_nota_json.ce

@@ -199,6 +199,6 @@ var result = {
   decodeNsPerOp: (decodeTime / totalOps) * 1e9
 };
 
-log.console(json.encode(result));
+log.console(result);
 
 $_.stop()