Revert "Merge pull request #1 from nelstrom/patch-1"

This reverts commit 16c2c59aae49ca834f89e9ca232bfc93c46925dc, reversing
changes made to 33705c09a54b907ea25726ce766a5b232484a15d.
Merge pull request #4 from google/revert-unlicensed-change

Revert "Merge pull request #1 from nelstrom/patch-1"
Merge branch 'master' of github.com:google/maktaba into contributing-guidelines