fix: pass a function to avrgirl for debugging

Author: ajfisher

lib/interchange.js

@@ -24,7 +24,6 @@ Interchange.prototype.clean_temp_dir = function(tmpdir) {
   // takes a temporary directory and cleans up any files within it and
   // then calls the callback to remove itself.
   if (tmpdir != undefined && tmpdir !== null && tmpdir !== '') {
-    tmpdir.removeCallback();
     fsextra.removeSync(tmpdir.name);
   }
 };
@@ -143,7 +142,7 @@ Interchange.prototype.flash_firmware = function(firmware, opts) {
     const avrgirl = new Avrgirl({
       board,
       port,
-      debug: true
+      debug: () => {}
     });
 
     avrgirl.flash(firmware, (err) => {