This script will remove the given hostname and also its SSL Certificate

Remove-BindingsFromCommerceSites.ps1

[CmdletBinding()]
param(
    [string] $SitePrefix = "habitathome",
    [string] $hostName = "localhost",
    [string] $CertificateName = "localhost",
    [string[]]$sites = @("CommerceAuthoring:5000", "CommerceMinions:5010", "CommerceOps:5015", "CommerceShops:5005", "SitecoreBizFx:4200", "SitecoreIdentityServer:5050")
)

$ErrorActionPreference = 'Stop'
Import-Module WebAdministration

Function Remove-Binding {
    foreach ($site in $sites) {
        $siteinfo = $site.split(':')
        $sitename = "$($siteinfo[0])_$($SitePrefix)"
        $siteport = $siteinfo[1]

        #region ValidatePreconditions
        if( -not ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole] "Administrator"))
        {
            Write-Warning "Add bindings requires Administrator rights"
            return
        }
      
        if( -not (Test-Path -Path (Join-Path "IIS:\Sites" -ChildPath $sitename ) ) )
        {
            Write-Warning "Site '$sitename' does not exist."
            return
        }
        #endregion

        $bindings = Get-WebBinding -Name $sitename;

        if( $bindings.bindingInformation -match $hostName )
        {
            Write-Verbose "Removes a binding '$hostName' from an IIS '$webSite' site."
            Remove-WebBinding -Name $sitename -IPAddress "*" -Port $siteport -HostHeader  $hostName
        }
    }
}

Function Remove-Certificate {
    $cert = Get-ChildItem -Path "cert:\LocalMachine\My" | Where-Object { $_.subject -like "CN=$hostName" -and $_.FriendlyName -match "Sitecore Commerce Services SSL Certificate" }

    if ($cert -and $cert.Thumbprint) {
        $certPath = "cert:\LocalMachine\My\" + $($cert.Thumbprint)
        Write-Host "Removing certificate $certificateName ($certPath)" -ForegroundColor Green
        Remove-Item $certPath
    }
    else {
        Write-Host "Could not find certificate $certificateName under cert:\LocalMachine\My" -ForegroundColor Yellow
    }
}

Remove-Binding
Remove-Certificate