Update .gitignore

Remove .ipynb as translations are not being done.

Author: leestott

.gitignore

@@ -351,6 +351,5 @@ MigrationBackup/
 
 # Ionide (cross platform F# VS Code tools) working folder
 .ionide/
-4-Data-Science-Lifecycle/14-Introduction/README.md
 .vscode/settings.json
-*.ipynb
+