Remove Public preview tag for EnableAutoExpirationVersionTrim

Remove Public preview tag for EnableAutoExpirationVersionTrim

Author: BrennyChao

sharepoint/sharepoint-ps/sharepoint-online/Set-SPOTenant.md

@@ -2792,8 +2792,6 @@ The valid values are:
 > a. `MajorVersionLimit` accepts values from 1 through 50,000 (inclusive).
 > b. `ExpireVersionsAfterDays` accepts values of 0 to Never Expire or values >= 30 to delete versions that exceed that time period.
 > When version history limits are managed automatically (`EnableAutoExpirationVersionTrim $true`), setting `MajorVersionLimit` or `ExpireVersionsAfterDays` will result in an error as the count limits are set by the service.
->
-> This parameter is currently under public preview.
 
 PARAMVALUE: $true | $false