Remove now unneeded single quotes in examples

examples/overlay.js

@@ -51,12 +51,11 @@ map.on('click', function(evt) {
 
   $(element).popover('destroy');
   popup.setPosition(coordinate);
-  // the keys are quoted to prevent renaming in ADVANCED mode.
   $(element).popover({
-    'placement': 'top',
-    'animation': false,
-    'html': true,
-    'content': '<p>The location you clicked was:</p><code>' + hdms + '</code>'
+    placement: 'top',
+    animation: false,
+    html: true,
+    content: '<p>The location you clicked was:</p><code>' + hdms + '</code>'
   });
   $(element).popover('show');
 });