One more retired variable

Author: gigazelle

help/implement/TOC.md

@@ -25,7 +25,6 @@ user-guide-description: Learn ways to implement Adobe Analytics. Customize what
     + [currencyCode](vars/config-vars/currencycode.md)
     + [decodeLinkParameters](vars/config-vars/decodelinkparameters.md)
     + [dynamicVariablePrefix](vars/config-vars/dynamicvariableprefix.md)
-    + [fpCookieDomainPeriods](vars/config-vars/fpcookiedomainperiods.md)
     + [linkDownloadFileTypes](vars/config-vars/linkdownloadfiletypes.md)
     + [linkExternalFilters](vars/config-vars/linkexternalfilters.md)
     + [linkInternalFilters](vars/config-vars/linkinternalfilters.md)

help/implement/vars/config-vars/configuration-variables.md

@@ -56,6 +56,7 @@ The following configuration variables are retired. They are documented here for
 * **`account`**: Determined the report suite that data was sent to. Report suite is now handled through tracking object instantiation (the [`s_gi()`](../functions/s-gi.md) method). Use the [`s.sa()`](../functions/sa-method.md) method if you need to change the report suite after the tracking object is instantiated.
 * **`cookieDomain`**: Determined the domain on which AppMeasurement set cookies. Current versions of AppMeasurement automatically detect the correct cookie domain, making this variable obsolete.
 * **`cookieDomainPeriods`**: Helped AppMeasurement determine where to store cookies when a domain contained multiple periods. Current versions of AppMeasurement automatically detect the correct domain, making this variable obsolete.
+* **`fpCookieDomainPeriods`**: The first-party equivalent of `cookieDomainPeriods`, used to set cookies in the correct location when a first-party domain's suffix contained an extra period (such as `example.co.uk`). Current versions of AppMeasurement automatically detect the correct domain, making this variable obsolete.
 * **`trackingServer`**: Specified the domain used to send data to Adobe over HTTP. It is deprecated in favor of secure data collection over HTTPS. Use [`trackingServerSecure`](trackingserversecure.md) instead.
 * **`trackInlineStats`**: Enabled or disabled previous versions of [Activity Map](/help/analyze/activity-map/overview.md).
 * **`visitorMigrationKey`**: Carried a key used to migrate visitors from third-party to first-party cookies. It is retired because modern libraries set a first-party fallback cookie (`fid`) and rely on the Experience Cloud ID Service for identity.