[1.7.x] Removed notes for versions of SQLite older than 5 years.
[1.7.x] Removed notes for versions of SQLite older than 5 years.

Backport of a9fa3d4667 from master

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