Textpad for Windows will be your new hero. It's the best text editor I've ever used; regular expression search and replace, syntax highlighting for all the major languages, force upper, force lower, macro support for things like java compiling, sentence case, auto code indenting, Windows shell integration... I fuckin' love it.
That said, download Textpad at
www.textpad.com and open your file with it.
F8 for replace, check "Regular expression", put "Thesis Title *[0-9]*" in the Find Box, leave Replace empty, and click Replace / Replace All.
That will blank the line. If you want to blank the line and also remove it (move everything up one line) use "Thesis Title *[0-9]*\n" for the Find field.