Doc | Remove outdated comment about flags default values

Author: BillCarsonFr

libraries/featureflag/api/src/main/kotlin/io/element/android/libraries/featureflag/api/FeatureFlags.kt

@@ -13,8 +13,6 @@ import io.element.android.libraries.core.meta.BuildType
 
 /**
  * To enable or disable a FeatureFlags, change the `defaultValue` value.
- * Warning: to enable a flag for the release app, you MUST update the file
- * [io.element.android.libraries.featureflag.impl.StaticFeatureFlagProvider]
  */
 enum class FeatureFlags(
     override val key: String,