Update mediation.mdx

Author: malandr2

docs/mediation.mdx

@@ -304,7 +304,7 @@ Next, add the dependency in your module's `.podspec` file.
 File: `modules/google-mobile-ads-mediation-applovin/google-mobile-ads-mediation-applovin.podspec`
 
 ```
-# Add the third-party pod dependency. Replace {X.Y.Z.A} with the specific adapter version you are integrating.
+# Add the third-party pod dependency.
 s.dependency 'GoogleMobileAdsMediationAppLovin'
 ```