Revert "Interstitial Ads additions (#2851)"

This reverts commit e561569.

_data/sidebar.yml

@@ -506,14 +506,6 @@
   sectionTitle:
   subgroup: 8
 
-- sbSecId: 1
-  title: Interstitial Ads
-  link: /features/interstitialAds.html
-  isHeader: 0
-  isSectionHeader: 0
-  sectionTitle:
-  subgroup: 8
-
 - sbSecId: 1
   title: Timeouts
   link: /features/timeouts.html

dev-docs/adunit-reference.md

@@ -37,7 +37,7 @@ See the table below for the list of properties on the ad unit.  For example ad u
 | `mediaTypes` | Optional | Object                                | Defines one or more media types that can serve into the ad unit.  For a list of properties, see [`adUnit.mediaTypes`](#adUnit.mediaTypes) below.                                           |
 | `labelAny`   | Optional | Array[String]                         | Used for [conditional ads][conditionalAds].  Works with `sizeConfig` argument to [pbjs.setConfig][configureResponsive].                                                                    |
 | `labelAll`   | Optional | Array[String]                         | Used for [conditional ads][conditionalAds]. Works with `sizeConfig` argument to [pbjs.setConfig][configureResponsive].                                                                     |
-| `ortb2Imp`   | Optional | Object                         | ortb2Imp is used to signal OpenRTB Imp objects at the adUnit grain. Similar to the global ortb2 field used for [global first party data configuration](/dev-docs/publisher-api-reference.html#setConfig-fpd), but specific to this adunit. The ortb2Imp object currently supports [first party data](#adUnit-fpd-example) and the [insterstitial](#adUnit-interstitial-example) signal |
+| `ortb2Imp`   | Optional | Object                         | Similar to [global first party data configuration](/dev-docs/publisher-api-reference.html#setConfig-fpd), but specific to this adunit. Note that the setConfig data is global to the logical OpenRTB object, but AdUnit-specific data is defined in the scope of a particular imp object. |
 
 <a name="adUnit.bids" />
 
@@ -547,29 +547,6 @@ Notes:
 - Only contextual data should be added on the AdUnit; user-related data goes in the [global first party data](/dev-docs/publisher-api-reference.html#setConfig-fpd) config.
 - For additional help with analytics and reporting you can use the [Prebid Ad Slot](/features/pbAdSlot.html), a special type of first party data.
 
-<a name="adUnit-interstitial-example">
-
-### Interstitial Ads
-
-Example of an adunit-specific interstitial signal:
-
-{% highlight js %}
-pbjs.addAdUnits({
-    code: "test-div",
-    mediaTypes: {
-        banner: {
-            sizes: [[300,250]]
-        }
-    },
-    ortb2Imp: {
-    	instl:1
-    },
-    ...
-});
-{% endhighlight %}
-
-For more information on Interstitial ads, reference the [Interstitial feature page](/dev-docs/InterstitialAds.html).
-
 ## Related Topics
 
 + [Publisher API Reference]({{site.baseurl}}/dev-docs/publisher-api-reference.html)