[BUGFIX] remove debug output

system/upgrade/run.php

@@ -25,14 +25,10 @@ function rrmdir($dir) {
 
 //run upgrade specific stuff
 if(isGraterThan("2.3")) {// 2.4, 2.5, ...
-    echo "yes";
     if(file_exists("vendor/")){
         rrmdir("vendor/");
     }
 }
-else{
-    echo "no";
-}
 
 if(isGraterThan("2.3")) {
     file_put_contents("index.php",file_get_contents("system/upgrade/index.php"));