bootstrap 移除css,CSS-如何删除默认的Bootstrap 3轮播控件背景渐变？

我很确定这是我需要修改的代码，但是由于某些原因，我无法使IE中的渐变消失。 我希望它们完全消失！

.carousel-control {

text-shadow: none;

opacity: 1;

filter: alpha(opacity=100)

}

.carousel-control.left {

background-image: -webkit-gradient(linear, 0 top, 100% top, from(rgba(0,0,0,0.5)), to(rgba(0,0,0,0.0001)));

background-image: -webkit-linear-gradient(left, color-stop(rgba(0,0,0,0.5) 0), color-stop(rgba(0,0,0,0.0001) 100%));

background-image: -moz-linear-gradient(left, rgba(0,0,0,0.5) 0, rgba(0,0,0,0.0001) 100%);

background-image: linear-gradient(to right, rgba(0,0,0,0.5) 0, rgba(0,0,0,0.0001) 100%);

background-repeat: repeat-x;

filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#80000000', endColorstr='#00000000', GradientType=1)

}

.carousel-control.right {

background-image: -webkit-gradient(linear, 0 top, 100% top, from(rgba(0,0,0,0.0001)), to(rgba(0,0,0,0.5)));

background-image: -webkit-linear-gradient(left, color-stop(rgba(0,0,0,0.0001) 0), color-stop(rgba(0,0,0,0.5) 100%));

background-image: -moz-linear-gradient(left, rgba(0,0,0,0.0001) 0, rgba(0,0,0,0.5) 100%);

background-image: linear-gradient(to right, rgba(0,0,0,0.0001) 0, rgba(0,0,0,0.5) 100%);

background-repeat: repeat-x;

filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#00000000', endColorstr='#80000000', GradientType=1)

}

.carousel-control:hover, .carousel-control:focus {

opacity: 1;

filter: alpha(opacity=100)

}