MemberPress: Hide the Coupon Field on Sign-Up Forms

Hides the coupon code field on MemberPress registration forms so visitors without a code don't leave to hunt for one; coupon links keep working.

Code

.mepr-signup-form .mepr_coupon,
.mepr-signup-form .mepr-coupon-code,
.mepr-signup-form .have-coupon-link {
    display: none !important;
}

Coupons can still be applied with a link that adds ?coupon=CODE to the sign-up page.

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