delete duplicated options

Author: mishanga

.csscomb.json

@@ -165,10 +165,6 @@
             "-ms-animation-iteration-count",
             "-o-animation-iteration-count",
             "animation-iteration-count",
-            "-webkit-animation-iteration-count",
-            "-moz-animation-iteration-count",
-            "-ms-animation-iteration-count",
-            "-o-animation-iteration-count",
             "animation-iteration-count",
             "-webkit-animation-direction",
             "-moz-animation-direction",
@@ -307,15 +303,6 @@
             "-webkit-box-shadow",
             "-moz-box-shadow",
             "box-shadow",
-            "-webkit-box-shadow",
-            "-moz-box-shadow",
-            "box-shadow",
-            "-webkit-box-shadow",
-            "-moz-box-shadow",
-            "box-shadow",
-            "-webkit-box-shadow",
-            "-moz-box-shadow",
-            "box-shadow",
             "filter:progid:DXImageTransform.Microsoft.gradient",
             "-ms-filter:\\'progid:DXImageTransform.Microsoft.gradient",
             "text-shadow"