removed mysql from travis.yml
removed mysql from travis.yml

MicroPyramid/micro-blog,MicroPyramid/django-blog-it,nikhila05/micro-blog,MicroPyramid/micro-blog,MicroPyramid/django-blog-it,nikhila05/micro-blog,MicroPyramid/micro-blog,MicroPyramid/django-blog-it,nikhila05/micro-blog