chore(css): remove historic IE quirks

Author: Rotzbua

assets/css/style.css

@@ -72,7 +72,6 @@ pre {
 
 input[type="radio"] {vertical-align: text-bottom;}
 input[type="checkbox"] {vertical-align: bottom; *vertical-align: baseline;}
-.ie6 input {vertical-align: text-bottom;}
 
 select, input, textarea {font: 99% sans-serif;}
 
@@ -109,12 +108,6 @@ button, input, select, textarea {margin: 0;}
 
 /* make buttons play nice in IE */
 button {width: auto; overflow: visible;}
- 
-/* scale images in IE7 more attractively */
-.ie7 img {-ms-interpolation-mode: bicubic;}
-
-/* prevent BG image flicker upon hover */
-.ie6 html {filter: expression(document.execCommand("BackgroundImageCache", false, true));}
 
 /* let's clear some floats */
 .clearfix:before, .clearfix:after { content: "\0020"; display: block; height: 0; overflow: hidden; }