[1.7.x] Removed a note about old versions of MySQLdb.
[1.7.x] Removed a note about old versions of MySQLdb.

Backport of f3bc7c5447a1e4bfa428a7ff32ea3336850c5c2d from master

oscaro/django,jyotsna1820/django,jyotsna1820/django,oscaro/django,oscaro/django,jyotsna1820/django,oscaro/django,jyotsna1820/django