Remove ', limit: 255' from schema
Remove ', limit: 255' from schema

Running rake db:migrate had added these limits to the schema automatically. This reverts them.

rubygems/rubygems.org,rubygems/rubygems.org,sonalkr132/rubygems.org,rubygems/rubygems.org,sonalkr132/rubygems.org,rubygems/rubygems.org,sonalkr132/rubygems.org,sonalkr132/rubygems.org