Update yandex.md in dev-docs (#6415)

1. Fixed the Prebid Client text
2. Added contact info
3. Removed unnecessary information

Author: yndxcdn

dev-docs/bidders/yandex.md

@@ -3,16 +3,15 @@ layout: bidder
 title: Yandex
 description: Prebid Yandex Bidder Adapter
 pbjs: true
-pbs: true
 biddercode: yandex
-media_types: banner, native
+media_types: banner
 sidebarType: 1
 privacy_sandbox: topics
 ---
 
 ### Prebid Client
 
-This Adapter integrates with Yandex's ad services.
+This Adapter integrates with Yandex's ad services. Please reach out to <prebid@yandex-team.com> for the integration guide and more details.
 
 {: .alert.alert-info :}
 For detailed auction analytics, check out our [Analytics Adapter](/dev-docs/analytics/yandex.html).
@@ -35,10 +34,10 @@ To improve the personalization of ads for publishers’ users, check out our [Us
 ```js
 // Simple banner
 const adUnits = [{
-  code: 'banner-1',
+  code: 'adunit-1',
   mediaTypes: {
     banner: {
-      sizes: [[240, 400]],
+      sizes: [[300, 250]],
     }
   },
   bids: [
@@ -51,50 +50,6 @@ const adUnits = [{
     }
   ]
 }];
-
-// Native
-const adUnits = [{
-  code: 'native-1',
-  mediaTypes: {
-    native: {
-      ortb: {
-        assets: [{
-            id: 1,
-            required: 1,
-            img: {
-              type: 3,
-              w: 300,
-              h: 300,
-            }
-          },
-          {
-            id: 2,
-            required: 1,
-            title: {
-              len: 80
-            }
-          },
-          {
-            id: 3,
-            required: 1,
-            data: {
-              type: 1
-            }
-          }
-        ]
-      }
-    }
-  },
-  bids: [
-    {
-      bidder: 'yandex',
-      params: {
-        placementId: 'R-A-346580-140',  // native adunit ID
-        cur: 'USD' // EUR, TRY, etc.
-      },
-    }
-  ]
-}];
 ```
 
 #### Topics Iframe Configuration
@@ -115,39 +70,3 @@ pbjs.setConfig({
   }
 })
 ```
-
-### Prebid Server
-
-{: .alert.alert-info :}
-We maintain both **PBS Java** and **PBS Go** adapters, but **PBS Go** is recommended for integration and will receive updates first
-
-#### Server Bid Params
-
-These params are basically the same that you'd use for 
-
-{: .table .table-bordered .table-striped }
-| Name           | Scope                                               | Description                        | Example         | Type      | Supported in     |
-| -------------- | --------------------------------------------------- | ---------------------------------- | --------------- | --------- | ---------------- |
-| `placement_id` | required                                            | Ad unit ID. Prebid versions > 7.30 | `R-A-1234567-1` | `String`  | PBS Go           |
-| `page_id`      | optional, **deprecated** in favor of `placement_id` | Page ID                            | `123`           | `Integer` | PBS Go, PBS Java |
-| `imp_id`       | optional, **deprecated** in favor of `placement_id` | Imp ID                             | `1`             | `Integer` | PBS Go, PBS Java |
-
-#### Prebid Server Test Request
-
-The following test parameters can be used to verify that Prebid Server is working properly with the
-server-side adapter.
-
-```json
-"imp": [{
-  "id": "imp_id",
-  "banner": {
-    "w": 300,
-    "h": 600
-  },
-  "ext": {
-    "bidder": {
-      "placement_id": "R-A-1234567-1"
-    }
-  }
-}]
-```