Public/Remove/Remove-ISETheme.ps1

function Remove-ISETheme {
[Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseShouldProcessForStateChangingFunctions','')]
    [cmdletbinding()]
    Param(
        [Parameter(ValueFromPipeline=$True,ValueFromPipelinebyPropertyName=$True)]
        [string]$ThemeName
    )

    Begin{}

    Process {
        Remove-ItemProperty HKCU:\Software\Microsoft\PowerShell\3\Hosts\PowerShellISE\ColorThemes -Name '$ThemeName'
    }

    End{}
    <#
        .SYNOPSIS
            Deletes an ISE theme from the ISE
 
        .DESCRIPTION
            Deletes an ISE theme from the ISE
 
        .PARAMETER ThemeName
            An ISE theme name
 
        .EXAMPLE
            PS C:\> Remove-ISETheme "Monokai"
 
            Deletes an ISE theme from the ISE
 
        .NOTES
            Part of the ISEColorThemeCmdlets.ps1 Script by Jeff Pollock
            http://Lifeinpowerhsell.blogspot.com
            http://gallery.technet.microsoft.com/ISE-Color-Theme-Cmdlets-24905f9e
    #>


}