I have two lines, lets say "-line1-" and "-line2-" and between these lines I have some lines. The amount and the content of these lines are unknown. Like this:

some lines
-line1-
lineA: xxx
lineB: y
lineC: zz
-line2-
more lines
[download]

So, I want to remove everything between "-line1-" and "-line2-", in this case lines A, B and C. How can I do this?

Originally posted as a Categorized Question.