This drops every line with a numeric character anywhere in it, keeping only purely non-numeric lines.
When numbers signal noise
In many exports, digits mark the rows you do not want: paginated URLs, dated archives, SKU-bearing paths, session identifiers. Removing anything containing a digit clears them in one pass.
A blunt instrument, deliberately
It makes no distinction between a page number and a meaningful figure. top-10-tips goes with page-2. That bluntness is the point when the goal is a fast reduction, and a liability when the list contains numbers you need.
Check before committing
Compare the line count before and after. A larger drop than expected means the list contained more meaningful numbers than assumed.
Try it: Remove Lines With Digits on SeoWolf's Notepad.