At the bottom of the window, set the to Regular expression .
In Find what , paste \d{2}:\d{2}:\d{2},\d{3} --> \d{2}:\d{2}:\d{2},\d{3} . Leave Replace with blank and click Replace All . subtitle A.Quite.Place.Part.II.WEBRip.x264-ION1...
If you use the free text editor Notepad++ , you can use "Regular Expressions" to delete the clutter in two clicks. Open the file in Notepad++ and press Ctrl + H . At the bottom of the window, set the to Regular expression
Press Ctrl + H (Windows) or Cmd + Shift + H (Mac) to open Find and Replace. At the bottom of the window