Notepad++ Regular expression find and delete a line

Question

Step 1

• Search → Find → (goto Tab) Mark
• Find what: ^Session.*$
• Enable the checkbox Bookmark line
• Enable the checkbox Regular expression (under Search Mode)
• Click Mark All (this will find the regex and highlights all the lines and bookmark them)

Step 2

• Search → Bookmark → Remove Bookmarked Lines

If it supports standard regex...

find:
^.*#RedirectMatch Permanent.*$

replace:

Replace with nothing.

Provide the following in the search dialog:

Find What: ^$\r\n
Replace With: (Leave it empty)

Click Replace All

Combining the best from all the answers

Using the "Replace all" functionality, you can delete a line directly by ending your pattern with:

• If your file have linux (LF) line ending : $\n?
• If your file have windows (CRLF) line ending : $(\r\n)?

For instance, in your case :

.*#RedirectMatch Permanent.*$\n?