Remove applet.html handling

This was a remnant of Processing, this file has no special meaning for
an Arduino sketch, so this code can just be removed.

Author: matthijskooijman

app/src/processing/app/Sketch.java

@@ -648,14 +648,6 @@ protected boolean saveAs() throws IOException {
       Base.copyDir(data.getCodeFolder(), newCodeFolder);
     }
 
-    // copy custom applet.html file if one exists
-    // http://dev.processing.org/bugs/show_bug.cgi?id=485
-    File customHtml = new File(data.getFolder(), "applet.html");
-    if (customHtml.exists()) {
-      File newHtml = new File(newFolder, "applet.html");
-      Base.copyFile(customHtml, newHtml);
-    }
-
     // save the main tab with its new name
     File newFile = new File(newFolder, newName + ".ino");
     data.getCode(0).saveAs(newFile);