Question

why is pluto removed from solar system

Answer 1

pluto is still there .
. Pluto has only been reclassified and is no longer categorized as a planet.
Because it is smaller than planets & unable to possess properties requisite to be the planet e.g. sufficient gravitational force to chart out its orbit. It lurks into the orbit of the planet 'Neptune' next it. It is also not so small so as to be qualified as astroid. Hence it is rightly clasified as dwarf planet.

Answer 2

pluto is not removed .it is still there.
Because Pluto was a very small planet. Since it was so small scientists banned the planet because of its size.