Rasak,

          This can be done with the Find and Replace command, which you can open with CTRL+H.

          In the find field enter "^g" (a caret or circumflex, followed immediately by g without the quotes) and in the replace field enter nothing, since you're trying to remove the graphics.  The carat G represents any graphic (image) in the document.

          Hit ALT+A to activate the Replace All button and this should have removed all images in the file, leaving only text.  Then activate the close button on the Find and Replace dialog.

--
Brian  - Windows 10 Home, 64-Bit, Version 1703, Build 15063  (dot level on request - it changes too often to keep in signature)

 
If you don't like someone, the way he holds his spoon will make you furious; if you do like him, he can turn his plate over into your lap and you won't mind.     ~ Irving Becker