Tooltip: Remove hideFrom.tooltip check for tooltip headers (#109925)

public/app/plugins/panel/canvas/components/CanvasTooltip.tsx

@@ -57,7 +57,7 @@ export const CanvasTooltip = ({ scene }: Props) => {
   const shouldDisplayTimeContentItem =
     timeField && lastTimeValue && element.data.field && getFieldDisplayName(timeField) !== element.data.field;
 
-  const headerItem: VizTooltipItem | null = {
+  const headerItem: VizTooltipItem = {
     label: element.getName(),
     value: '',
   };

public/app/plugins/panel/histogram/HistogramTooltip.tsx

@@ -50,12 +50,10 @@ export const HistogramTooltip = ({
   const xMinVal = formattedValueToString(xMinDisp!(xMinField.values[dataIdxs[0]!]));
   const xMaxVal = formattedValueToString(xMaxDisp!(xMaxField.values[dataIdxs[1]!]));
 
-  const headerItem: VizTooltipItem | null = xMinField.config.custom?.hideFrom?.tooltip
-    ? null
-    : {
-        label: 'Bucket',
-        value: `${xMinVal} - ${xMaxVal}`,
-      };
+  const headerItem: VizTooltipItem = {
+    label: 'Bucket',
+    value: `${xMinVal} - ${xMaxVal}`,
+  };
 
   const contentItems = useMemo(
     () => getContentItems(xMinOnlyFrame.fields, xMinField, dataIdxs, seriesIdx, mode, sortOrder),

public/app/plugins/panel/timeseries/TimeSeriesTooltip.tsx

@@ -90,12 +90,10 @@ export const TimeSeriesTooltip = ({
     }
   }
 
-  const headerItem: VizTooltipItem | null = xField.config.custom?.hideFrom?.tooltip
-    ? null
-    : {
-        label: xField.type === FieldType.time ? '' : (xField.state?.displayName ?? xField.name),
-        value: xVal,
-      };
+  const headerItem: VizTooltipItem = {
+    label: xField.type === FieldType.time ? '' : (xField.state?.displayName ?? xField.name),
+    value: xVal,
+  };
 
   return (
     <VizTooltipWrapper>