Update Get-CsOnlineUser.md

Removing deprecated parameters.

Author: praspatil05

teams/teams-ps/teams/Get-CsOnlineUser.md

@@ -25,7 +25,6 @@ Get-CsOnlineUser [[-Identity] <UserIdParameter>]
  [-SkipUserPolicies]
  [-SoftDeletedUser]
  [-Sort]
- [-UsePreferredDC]
  [<CommonParameters>]
 ```
 
@@ -190,7 +189,6 @@ Default value: None
 Accept pipeline input: False
 Accept wildcard characters: False
 ```
-
 ### -ResultSize
 
 **Note**: Starting with Teams PowerShell Modules version 4.0 and later, "-ResultSize" type has been changed to uint32.
@@ -267,22 +265,6 @@ Accept pipeline input: False
 Accept wildcard characters: False
 ```
 
-### -UsePreferredDC
-
-Reserved for Microsoft internal use.
-
-```yaml
-Type: SwitchParameter
-Parameter Sets: (All)
-Aliases:
-
-Required: False
-Position: Named
-Default value: False
-Accept pipeline input: False
-Accept wildcard characters: False
-```
-
 ### CommonParameters
 This cmdlet supports the common parameters: -Debug, -ErrorAction, -ErrorVariable, -InformationAction, -InformationVariable, -OutVariable, -OutBuffer, -PipelineVariable, -Verbose, -WarningAction, and -WarningVariable. For more information, see [about_CommonParameters](https://go.microsoft.com/fwlink/?LinkID=113216).