Remove example CSS selectors from locale file

app/assets/javascripts/admin/components/embedding-setting.js.es6

@@ -6,11 +6,6 @@ export default Ember.Component.extend({
   @computed('field')
   inputId(field) { return field.dasherize(); },
 
-  @computed('placeholder')
-  placeholderValue(placeholder) {
-    return placeholder ? I18n.t(placeholder) : null;
-  },
-
   @computed('field')
   translationKey(field) { return `admin.embedding.${field}`; },
 
@@ -21,7 +16,7 @@ export default Ember.Component.extend({
   checked: {
     get(value) { return !!value; },
     set(value) {
-      this.set('value', value); 
+      this.set('value', value);
       return value;
     }
   }

app/assets/javascripts/admin/templates/components/embedding-setting.hbs

@@ -5,7 +5,7 @@
   </label>
 {{else}}
   <label for={{inputId}}>{{i18n translationKey}}</label>
-  {{input value=value id=inputId placeholder=placeholderValue}}
+  {{input value=value id=inputId placeholder=placeholder}}
 {{/if}}
 
 <div class='clearfix'></div>

app/assets/javascripts/admin/templates/embedding.hbs

@@ -48,11 +48,11 @@
 
     {{embedding-setting field="embed_whitelist_selector"
                         value=embedding.embed_whitelist_selector
-                        placeholder="admin.embedding.whitelist_example"}}
+                        placeholder="article, #story, .post"}}
 
     {{embedding-setting field="embed_blacklist_selector"
                         value=embedding.embed_blacklist_selector
-                        placeholder="admin.embedding.blacklist_example"}}
+                        placeholder=".ad-unit, header"}}
   </div>
 
   <div class='embedding-secondary'>

config/locales/client.en.yml

@@ -2595,9 +2595,7 @@ en:
         embed_username_key_from_feed: "Key to pull discourse username from feed"
         embed_truncate: "Truncate the embedded posts"
         embed_whitelist_selector: "CSS selector for elements that are allowed in embeds"
-        whitelist_example: "article, #story, .post"
         embed_blacklist_selector: "CSS selector for elements that are removed from embeds"
-        blacklist_example: ".ad-unit, header"
         feed_polling_enabled: "Import posts via RSS/ATOM"
         feed_polling_url: "URL of RSS/ATOM feed to crawl"
         save: "Save Embedding Settings"