chore(Header/Footer) Remove group-panel elements from header and foot…

…er. Grouping should be in it's own feature module when it is developed

src/less/footer.less

@@ -19,16 +19,6 @@
   .border-radius(@topPanelRadius, 0, 0, @topPanelRadius);
 }
 
-.ui-grid-group-panel {
-  .gradient(@headerBackgroundColor, @headerGradientStart, @headerGradientStop);
-  border-bottom: 1px solid @borderColor; // #D4D4D4
-  border-top: 1px solid @borderColor; // #D4D4D4
-  .border-radius(@topPanelRadius, 0, 0, @topPanelRadius);
-  min-height: 30px;
-}
-.ui-grid-footer-group-panel .hidden {
-  display: none;
-}
 
 .ui-grid-footer-viewport {
   overflow: hidden; // Disable so menus show up

src/less/header.less

@@ -23,15 +23,6 @@
     .border-radius(@topPanelRadius, 0, 0, @topPanelRadius);
 }
 
-.ui-grid-group-panel {
-  .gradient(@headerBackgroundColor, @headerGradientStart, @headerGradientStop);
-  border-bottom: 1px solid @borderColor; // #D4D4D4
-  .border-radius(@topPanelRadius, 0, 0, @topPanelRadius);
-  min-height: 30px;
-}
-  .ui-grid-header-group-panel .hidden {
-      display: none;
-  }
 
 .ui-grid-header-viewport {
   overflow: hidden; // Disable so menus show up

src/templates/ui-grid/ui-grid-footer.html

@@ -1,5 +1,4 @@
 <div class="ui-grid-footer-panel">
-    <div ui-grid-group-panel ng-show="grid.options.showGroupPanel"></div>
     <div class="ui-grid-footer ui-grid-footer-viewport">
         <div class="ui-grid-footer-canvas">
             <div ng-repeat="col in colContainer.renderedColumns track by col.colDef.name" ui-grid-footer-cell col="col" render-index="$index" class="ui-grid-footer-cell clearfix" ng-style="$index === 0 && colContainer.columnStyle($index)"></div>

src/templates/ui-grid/ui-grid-header.html

@@ -1,6 +1,5 @@
 <div class="ui-grid-header">
   <div class="ui-grid-top-panel">
-    <div ui-grid-group-panel ng-show="grid.options.showGroupPanel"></div>
     <div class="ui-grid-header-viewport">
       <div class="ui-grid-header-canvas">
           <div class="ui-grid-header-cell clearfix" ng-repeat="col in colContainer.renderedColumns track by col.colDef.name" ui-grid-header-cell col="col" render-index="$index" ng-style="$index === 0 && colContainer.columnStyle($index)">