Open the document in or copy it to a text editor with regex capabilities I am writing this with notepad++ in mind but it should work similarly with other editors. Open find&replace in the editor (probably strg+f). Make sure to enable regex matching. In the search field enter
if you only want to remove the numbers or
if you also want to remove the whitespaces on the right of the numbers. In the replace field enter
Replace all and you should be done. You can try
Find all first if you want to make sure that the regex actually works (I am not 100% sure and maybe you have some weird end-of-line characters).
Note: this only works if your document is just text and no sophisticated formatting like fonts and colors and bold and italics and all the other stuff you can do with word processors.