fix(tooltip): remove hideDelay and unused class

Author: RivaIvanova

src/app/interactions/tooltip/tooltip-simple/tooltip-simple.component.html

@@ -1,5 +1,9 @@
-<igx-avatar class="avatar" #target="tooltipTarget" [hideDelay]="10000000" [igxTooltipTarget]="tooltipRef"
-            src="assets/images/avatar/10.jpg" size="medium" shape="circle">
+<igx-avatar
+    #target="tooltipTarget"
+    [igxTooltipTarget]="tooltipRef"
+    src="assets/images/avatar/10.jpg"
+    size="medium"
+    shape="circle">
 </igx-avatar>
 
 <div #tooltipRef="tooltip" igxTooltip>