Remove the unnecessary $publicIp in the example

The $publicIP is added at the end of the script in the example. This should be removed.

Author: ahmedig

src/ResourceManager/Network/Commands.Network/help/Get-AzureRmPublicIpAddress.md

@@ -46,7 +46,7 @@ The **Get-AzureRmPublicIPAddress** cmdlet gets one or more public IP addresses i
 
 ### 1: Get a public IP resource
 ```
-$publicIp = Get-AzureRmPublicIpAddress -Name $publicIpName -ResourceGroupName $rgName $publicIp
+$publicIp = Get-AzureRmPublicIpAddress -Name $publicIpName -ResourceGroupName $rgName
 ```
 
 This command gets a public IP address resource with name $publicIPName in the resource group $rgName.