Yes, of course! I use sed often and I know regexps well. I'm not very skilled in awk, but I know it a little and I have a book about it too.
But if you only want to remove lines, grep would be enough
Anyway, probably I can do it, if you provide more details...

Hello

I can make Linux bash script for BTC - price depends on difficulty. It should be 0.2 for medium script, for very easy scripts it could be 0.05 BTC, for very difficult script it should be up to 1BTC.

I can send free examples:
YouTube downloader - it can download some (e.g. NOT all!) YouTube videos (valued for 0.5 BTC)
quick QR code maker - it can convert selected text to QR code - usable if you have smartphone (valued for 0.05 BTC)
simple image scaler - it can scale multiple images same way (for example to same width), should be used as nautilus-script (valued for 0.2 BTC)

I use Ubutnu but it should'nt be problem making scripts for other distro, sometimes additional programs are required (for example qrencode for quick QR code maker, imagemagick for image scaling)

What can I do:
Parse almost any website and retrieve data from it
Operate with almost any data
Output data in almost any format
Make simple GUI with program zenity (GNOME required)
Control other programs using DBUS interface, or other simple method
Making fake keyboard and mouse input (usable, if program doesn't support DBUS or other method)

What I can NOT (or don't want to) do:
break CAPTCHA
break sophisticated secure things
parsing obscure data

If you are interested in, write me, what script should do and I will inform you about price.
If I make script for you, it's yours: you can share it, and/or modify as you want.
Also, if you want other informations, write me...