fixed?

.atom/packages/atom-material-ui/styles/buttons.less

@@ -1,78 +0,0 @@
-.btn-background (@color, @hover-color, @selected-color, @text-color) {
-    color: @text-color;
-    background: none;
-
-    &:focus {
-        color: @text-color;
-    }
-
-    &:hover {
-        color: @text-color-highlight;
-        background: none;
-        .z-depth-2;
-    }
-
-    &:active, &:focus:active {
-        outline: none;
-    }
-
-    &.selected,
-    &.selected:hover {
-        color: @accent-text-color;
-        background-color: @base-color;
-    }
-}
-
-.btn-variant (@color) {
-    @bg: darken(@color, 10%);
-    @hover: @color;
-    @selected: @color;
-    .btn-background(@bg, @hover, @selected, @text-color-highlight);
-}
-
-.btn {
-    outline: none;
-    transition: box-shadow 250ms;
-    will-change: box-shadow;
-    .z-depth-1;
-    .btn-background(@button-background-color, @button-background-color-hover, @button-background-color-selected, @text-color);
-
-    &:focus, &:active {
-        outline: none;
-    }
-
-    .btn-group & {
-        box-shadow: none;
-        height: 100%;
-    }
-}
-
-.btn-group {
-    align-items: center;
-    .z-depth-1;
-}
-
-.btn.btn-primary {
-    .btn-variant(@base-color);
-}
-
-.btn.btn-info {
-    .btn-variant(@background-color-info);
-}
-
-.btn.btn-success {
-    .btn-variant(@background-color-success);
-}
-
-.btn.btn-warning {
-    .btn-variant(@background-color-warning);
-}
-
-.btn.btn-error {
-    .btn-variant(@background-color-error);
-}
-
-.caret {
-    border-top: 5px solid #fff;
-    margin-top: -1px;
-}