Remove CSS

Hi,

I have inserted a newsletter widget using code generated with the “form Style” options both set to none but the following css is inserted into my code;

<style scoped>.newsletter-form {
    width: 100%;
    display: block;
    margin: 15px 0;
    border: 0;
}

.newsletter-field {
    clear: both;
    text-align: left;
}

.newsletter-field label {
    display: inline-block;
    width: 135px;
    font-size: 14px;
    line-height: normal;
    text-align: right;
    margin-right: 15px;
}

.newsletter-field input, .newsletter-field select {
    padding: 5px;
    font-size: 14px;
    margin-right: 0;
    line-height: normal;
    border: 1px solid rgba(0,0,0,.1);
    border-radius: 2px;
}

.newsletter-field-preference label, .newsletter-field-privacy label {
    text-align: left;
}

.newsletter-field-preference, .newsletter-field-privacy, .newsletter-field-button {
    margin-left: 150px;
}

.newsletter-field-preference input {
    margin-right: 10px;
}

.newsletter-privacy {
    margin-right: 10px;
}

@media all and (max-width: 480px) {
    .newsletter-field label {
        display: block;
        text-align: left;
        width: 100%;
    }
    .newsletter-field-preference label, .newsletter-field-privacy label {
        display: inline;
        width: auto;
    }
    .newsletter-field-preference, .newsletter-field-privacy, .newsletter-field-button {
        margin-left: 0px;
    }
}

</style>

How do I remove this code?

Thank you.

https://wordpress.org/plugins/newsletter/