Simple line split and string removal/slice from the end of file

split-and-slice.py

import os

string = """
Introduction 03:39
How to sell your websites for $15,000 09:16
SECTION 2: BEATING THE COMPETITION: HOW TO DIFFERENTIATE YOUR WEB DESIGN SERVICES
"""

stringSplit = ''

stringNewlineBreak = string.split('\n')

for n in stringNewlineBreak:
    stringSplit += n[:-6] + '\n'

stringSplitCleaned = os.linesep.join(
    [s for s in stringSplit.splitlines() if s])

print stringSplitCleaned