remove ie7 support from mixins

less/mixins.less

@@ -10,7 +10,6 @@
 // --------
 // For clearing floats like a boss h5bp.com/q
 .clearfix {
-  *zoom: 1;
   &:before,
   &:after {
     display: table;
@@ -42,31 +41,6 @@
   margin-right: auto;
 }
 
-// IE7 inline-block
-// ----------------
-.ie7-inline-block() {
-  *display: inline; /* IE7 inline-block hack */
-  *zoom: 1;
-}
-
-// IE7 likes to collapse whitespace on either side of the inline-block elements.
-// Ems because we're attempting to match the width of a space character. Left
-// version is for form buttons, which typically come after other elements, and
-// right version is for icons, which come before. Applying both is ok, but it will
-// mean that space between those elements will be .6em (~2 space characters) in IE7,
-// instead of the 1 space in other browsers.
-.ie7-restore-left-whitespace() {
-  *margin-left: .3em;
-
-  &:first-child {
-    *margin-left: 0;
-  }
-}
-
-.ie7-restore-right-whitespace() {
-  *margin-right: .3em;
-}
-
 // Sizing shortcuts
 // -------------------------
 .size(@height, @width) {
@@ -477,14 +451,8 @@
 // -------------------------
 // Dividers (basically an hr) within dropdowns and nav lists
 .nav-divider(@top: #e5e5e5, @bottom: @white) {
-  // IE7 needs a set width since we gave a height. Restricting just
-  // to IE7 to keep the 1px left/right space in other browsers.
-  // It is unclear where IE is getting the extra space that we need
-  // to negative-margin away, but so it goes.
-  *width: 100%;
   height: 1px;
   margin: ((@baseLineHeight / 2) - 1) 1px; // 8px 1px
-  *margin: -5px 0 5px;
   overflow: hidden;
   background-color: @top;
   border-bottom: 1px solid @bottom;
@@ -493,9 +461,8 @@
 // Button backgrounds
 // ------------------
 .buttonBackground(@startColor, @endColor, @textColor: #fff, @textShadow: 0 -1px 0 rgba(0,0,0,.25)) {
-  // gradientBar will set the background to a pleasing blend of these, to support IE<=9
+  // gradientBar will set the background to a pleasing blend of these, to support IE<=*9
   .gradientBar(@startColor, @endColor, @textColor, @textShadow);
-  *background-color: @endColor; /* Darken IE7 buttons by default so they stand out more given they won't have borders */
   .reset-filter();
 
   // in these cases the gradient won't cover the background, so we override
@@ -505,7 +472,7 @@
     *background-color: darken(@endColor, 5%);
   }
 
-  // IE 7 + 8 can't handle box-shadow to show active, so we darken a bit ourselves
+  // IE8 can't handle box-shadow to show active, so we darken a bit ourselves
   &:active,
   &.active {
     background-color: darken(@endColor, 10%) e("\9");