updated book details

Author: learnbyexample

README.md

@@ -16,14 +16,12 @@ Free to read online versions:
 * [Perl one-liners cookbook](https://learnbyexample.github.io/learn_perl_oneliners/)
 * [100 Page Python Intro](https://learnbyexample.github.io/100_page_python_intro/)
 * [Practice Python Projects](https://learnbyexample.github.io/practice_python_projects/)
-* [Command line text processing with GNU Coreutils](https://learnbyexample.github.io/cli_text_processing_coreutils/) — work-in-progress
+* [Command line text processing with GNU Coreutils](https://learnbyexample.github.io/cli_text_processing_coreutils/)
 * [Command line text processing with Rust tools](https://learnbyexample.github.io/cli_text_processing_rust/) — work-in-progress
 * [Vim reference guide](https://learnbyexample.github.io/vim_reference/) — work-in-progress
 
 :information_source: :moneybag: You can buy PDF/EPUB versions from [Gumroad](https://learnbyexample.gumroad.com/) or [Leanpub](https://leanpub.com/u/learnbyexample)
 
-📢 📢 📢 🐍 [The Indie Python Extravaganza](https://leanpub.com/b/theindiepythonextravaganza/c/pytober) bundle is free till 31-Oct-2021.
-
 ### Ebook drafts
 
 * [Linux Command Line](https://github.com/learnbyexample/Linux_command_line) — Introduction to Linux commands and Shell scripting