Simplify and avoid confusion by removing explicit delimiter equal to the default

Author: marcandre

examples/basic.html

@@ -28,7 +28,6 @@ <h2>&lt;input type="text"&gt;</h2>
 				</div>
 				<script>
 				$('#input-tags').selectize({
-					delimiter: ',',
 					persist: false,
 					createOnBlur: true,
 					create: function(input) {

examples/plugins.html

@@ -34,7 +34,6 @@ <h2>Plugin: "remove_button"</h2>
 				<script>
 				$('.input-tags').selectize({
 					plugins: ['remove_button'],
-					delimiter: ',',
 					persist: false,
 					create: function(input) {
 						return {
@@ -63,7 +62,6 @@ <h2>Plugin: "restore_on_backspace"</h2>
 				<script>
 				$('#input-tags6').selectize({
 					plugins: ['restore_on_backspace'],
-					delimiter: ',',
 					persist: false,
 					create: function(input) {
 						return {
@@ -88,7 +86,6 @@ <h2>Plugin: "drag_drop"</h2>
 				<script>
 				$('.input-sortable').selectize({
 					plugins: ['drag_drop'],
-					delimiter: ',',
 					persist: false,
 					create: function(input) {
 						return {

examples/rtl.html

@@ -28,7 +28,6 @@ <h2>Right-to-left Support (RTL)</h2>
 				</div>
 				<script>
 				$('#input-tags').selectize({
-					delimiter: ',',
 					persist: false,
 					create: function(input) {
 						return {