SharePoint Online: Remove Custom Action Using PowerShell CSOM

Requirement: Delete a Custom Action in SharePoint Online using PowerShell

SharePoint Online: PowerShell to Remove Custom Action
Here is the PowerShell CSOM script to remove custom action.

#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"
  
#Set parameter values
$SiteURL="https://crescenttech.sharepoint.com/"
$CustomActionTitle = "SharePoint Admin Center"
 
Try{
    #Get 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 All Custom Actions
    $Web = $Ctx.Web
    $UserCustomActions= $Web.UserCustomActions
    $Ctx.Load($UserCustomActions)
    $Ctx.ExecuteQuery()

    #Get Custom Action(s) to delete
    $CustomActions = $UserCustomActions | Where { $_.Title -eq $CustomActionTitle }

    If($CustomActions -ne $Null)
    {
        #Delete all custom actions
        $CustomActions | ForEach-Object {
            #Remove the custom action
            $_.DeleteObject()
            Write-Host -f Green "Custom Action '$($_.Name)' Deleted Successfully!"
        }
        $Ctx.ExecuteQuery()
    }
    Else
    {
         write-host -f Yellow "Custom Action Does not Exist!"
    }
}
Catch {
        write-host -f Red "Error Removing Custom Action!" $_.Exception.Message
}

This deletes all custom actions with the provided title. You can get and delete them using its name, id or other parameters as well.