Unnecessary css gets generated after build

[ZSuraj]

I am using an input tag in my code

padding is working (means p-2 is overwriting the below padding:0;) but border is not applying. When i checked console, the below style border:0; was overwriting the border in the above code. The below code automatically generates and is found in build/ui.js file.
Why does it generate automatically?

input, textarea {
padding: 0;
border: 0;
margin: 0;
-webkit-appearance: none;
cursor: default;
font: inherit;
outline: 0;
}