Disable table hover in .content by default [Fixes #1295] (#1707)

* Disable table hover in .content #1295

* Remove reference to table hover in elements/content docs. 

Remove unnecessary $content-table-row-hover-background-color variable from sass file

docs/_data/variables/elements/content.json

@@ -61,11 +61,6 @@
       "name": "$content-table-cell-heading-color",
       "value": "$text-strong"
     },
-    "content-table-row-hover-background-color": {
-      "id": "content-table-row-hover-background-color",
-      "name": "$content-table-row-hover-background-color",
-      "value": "$background"
-    },
     "content-table-head-cell-border-width": {
       "id": "content-table-head-cell-border-width",
       "name": "$content-table-head-cell-border-width",
@@ -87,4 +82,4 @@
       "value": "$text-strong"
     }
   }
-}
+}

sass/elements/content.sass

@@ -12,7 +12,6 @@ $content-table-cell-border: 1px solid $border !default
 $content-table-cell-border-width: 0 0 1px !default
 $content-table-cell-padding: 0.5em 0.75em !default
 $content-table-cell-heading-color: $text-strong !default
-$content-table-row-hover-background-color: $background !default
 $content-table-head-cell-border-width: 0 0 2px !default
 $content-table-head-cell-color: $text-strong !default
 $content-table-foot-cell-border-width: 2px 0 0 !default
@@ -117,9 +116,6 @@ $content-table-foot-cell-color: $text-strong !default
     th
       color: $content-table-cell-heading-color
       text-align: left
-    tr
-      &:hover
-        background-color: $content-table-row-hover-background-color
     thead
       td,
       th