Add documentation for paragraph removal.

Author: chrahunt

README.md

@@ -84,6 +84,11 @@ doc.bookmarks['example_bookmark'].insert_text_after("Hello world.")
 # Insert multiple lines of text at our bookmark
 doc.bookmarks['example_bookmark_2'].insert_multiple_lines_after(['Hello', 'World', 'foo'])
 
+# Remove paragraphs
+doc.paragraphs.each do |p|
+  p.remove! if p.to_s =~ /TODO/
+end
+
 # Save document to specified path
 doc.save('example-edited.docx')
 ```