SharePoint Online: Delete Link in Quick Launch or Top Navigation using PowerShell

Requirement: Remove a Node from SharePoint Online Top Navigation or Quick Launch bar.

How to Remove a Link from SharePoint Online Top Navigation or Quick Launch Bar?
To remove links from SharePoint Online site navigation,

• Go to Site Settings >> Click on " Navigation" from Look and feel (You may have to use "Top link bar" if publishing feature is not enabled!)
• Select the navigation node or link in either global navigation (Top navigation) or from current navigation (Quick Launch)
• Click on "Delete" icon to delete the link from navigation. 
• Click on "OK" button in the bottom of the page to save your changes.

PowerShell to Delete a Navigation Node in SharePoint Online:
Here is the PowerShell to remove a node from quick launch or top navigation in SharePoint Online.

#Load SharePoint CSOM Assemblies
Add-Type -Path "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\ISAPI\Microsoft.SharePoint.Client.dll"
Add-Type -Path "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\ISAPI\Microsoft.SharePoint.Client.Runtime.dll"

#Remove Link from Navigation
Function Remove-SPONavigationNode()
{
    Param([Microsoft.SharePoint.Client.NavigationNodeCollection]$Navigation, [String]$NavigationTitle)

    #Iterate through and Remove the Node from Navigation
    For($i = $Navigation.Count - 1; $i -ge 0; $i--)
    {
        If($Navigation[$i].Title -eq $NavigationTitle)
        {
            $Navigation[$i].DeleteObject()
            $Ctx.ExecuteQuery()
            Write-Host -f Green "Removed " $NavigationTitle 
        }
        Else
        {
            #Check in 2nd Level Links
            $ChildLinks = $Navigation[$i].Children
            $Ctx.Load($ChildLinks)
            $Ctx.ExecuteQuery()

            #Call the function recursively
            If($ChildLinks.Count -gt 0)
            {
                Remove-SPONavigationNode -Navigation $ChildLinks -NavigationTitle $NavigationTitle
            }
        }
    }
}
 
#Config Parameters
$SiteURL="https://crescenttech.sharepoint.com/sites/marketing"

#Setup Credentials to connect
$Cred= Get-Credential
$Credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($Cred.Username, $Cred.Password)

#Setup the context
$Ctx = New-Object Microsoft.SharePoint.Client.ClientContext($SiteURL)
$Ctx.Credentials = $Credentials

#Get the Top Navigation bar of the web
$TopNavigation = $Ctx.Web.Navigation.TopNavigationBar #For Quick Launch, use: $Ctx.Web.Navigation.QuickLaunch
$Ctx.load($TopNavigation)
$Ctx.ExecuteQuery()

#Call the function to Remove a Node from navigation
Remove-SPONavigationNode -Navigation $TopNavigation -NavigationTitle "Support Center"

This PowerShell removes given navigation nodes and all its child nodes!

PnP PowerShell to Delete a Link in Quick Launch Navigation
Lets remove the "Site Contents" link which points to "/_layouts/15/viewlsts.aspx" from the left navigation in SharePoint Online site.

#Config Variables
$SiteURL = "https://crescenttech.sharepoint.com"
$LinkTitle = "Site contents"

#Connect to PNP Online
Connect-PnPOnline -Url $SiteURL -Credentials (Get-Credential)

#Get Quick Launch Navigation
$NavigationNodeCollection = Get-PnPNavigationNode -Location QuickLaunch

#Get the Link to Delete
$NavigationNode = $NavigationNodeCollection | Where-Object { $_.Title -eq  $LinkTitle}

#Delete Link from left navigation 
Remove-PnPNavigationNode -Identity $NavigationNode.Id -Force

Remove Link from Top Navigation using PnP PowerShell
This time, lets delete the "Home" link from top navigation bar of a SharePoint Online site.

#Config Variables
$SiteURL = "https://crescenttech.sharepoint.com"
$LinkTitle = "Home"

#Connect to PNP Online
Connect-PnPOnline -Url $SiteURL -Credentials (Get-Credential)

#Get the Top Navigation Bar
$NavigationNodeCollection = Get-PnPNavigationNode -Location TopNavigationBar

#Get the Link to Delete
$NavigationNode = $NavigationNodeCollection | Where-Object { $_.Title -eq  $LinkTitle}

#Delete Link from Top navigation 
Remove-PnPNavigationNode -Identity $NavigationNode.Id -Force