Gut grid mixins and replace with Susy for greater flexibility

_assets/css/_mixins.scss

@@ -46,67 +46,4 @@
     content: "";
     display: table;
   }
-}
-
-
-/*
-   Grid
-   ========================================================================== */
-
-@mixin container() {
-  margin: 0 auto;
-  width: $width;
-}
-
-// Works out the width of elements based on total number of columns and width
-// number of columns being displayed. Removes 20px for margins.
-
-@mixin grid($grid:$def_grid,$cols:'',$float:left,$display:inline) {
-  display: $display;
-  float: $float;
-  width: (100%/$grid * $cols) - ($margin * 2);
-}
-
-// Add x amount of column padding before an element
-// Example: @include prefix(1,12);
-
-@mixin prefix($grid:$def_grid,$cols:'') {
-  margin-left: (100%/$grid * $cols);
-}
-
-// Add x amount of column padding after an element
-// Example: @include suffix(2,12);
-
-@mixin suffix($grid:$def_grid,$cols:'') {
-  margin-right: (100%/$grid * $cols);
-}
-
-// Remove left margin
-// Example: @include first;
-
-@mixin first() {
-  margin-left: 0;
-}
-
-// Remove right margin
-// Example: @include last;
-
-@mixin last() {
-  margin-right: 0;
-}
-
-// Push an element x amount of column(s) to the right
-// Example: @include push(2,12);
-
-@mixin push($grid:$def_grid,$move:'') {
-  position: relative;
-  left: (100%/$grid * $move);
-}
-
-// Pull an element x amount of column(s) to the left
-// Example: @include pull(1,12);
-
-@mixin pull($grid:$def_grid,$move:'') {
-  position: relative;
-  left: (100%/$grid * $move) * -1;
-}
+}