How to remove unwanted line from txt file.

How to remove unwanted line from txt file. 

File Format:- Txt file

Before

$data = foreach($line in Get-Content c:\temp\comman1.txt)

{

    if($line -like '*6666*')

    {

    }

    else

    {

        $line

    }

}

$data | Set-Content C:\Temp\Comman1.txt -Force

After