Update cal-heatmap style overrides

Some were no longer needed, others needed `!important`.

app/assets/stylesheets/framework/calendar.scss

@@ -19,38 +19,33 @@
     }
   }
 }
+
 /**
 * This overwrites the default values of the cal-heatmap gem
 */
 .calendar {
   .qi {
-    background-color: #999;
     fill: #fff;
   }
 
   .q1 {
-    background-color: #dae289;
-    fill: #ededed;
+    fill: #ededed !important;
   }
 
   .q2 {
-    background-color: #cedb9c;
-    fill: #ACD5F2;
+    fill: #ACD5F2 !important;
   }
 
   .q3 {
-    background-color: #b5cf6b;
-    fill: #7FA8D1;
+    fill: #7FA8D1 !important;
   }
 
   .q4 {
-    background-color: #637939;
-    fill: #49729B;
+    fill: #49729B !important;
   }
 
   .q5 {
-    background-color: #3b6427;
-    fill: #254E77;
+    fill: #254E77 !important;
   }
 
   .domain-background {
@@ -59,32 +54,7 @@
   }
 
   .ch-tooltip {
-    position: absolute;
-    display: none;
-    margin-top: 22px;
-    margin-left: 1px;
-    font-size: 13px;
     padding: 3px;
     font-weight: 550;
-    background-color: #222;
-    span {
-      position: absolute;
-      width: 200px;
-      text-align: center;
-      visibility: hidden;
-      border-radius: 10px;
-      &:after {
-        content: '';
-        position: absolute;
-        top: 100%;
-        left: 50%;
-        margin-left: -8px;
-        width: 0;
-        height: 0;
-        border-top: 8px solid #000000;
-        border-right: 8px solid transparent;
-        border-left: 8px solid transparent;
-      }
-    }
   }
 }