Remove the max line from the global support chart (#1130)

We are currently at 1k+ features, so I would expect the max line to be
there. However, we currently calculate the max to be the max among the
current values. We should remove that line for now as it may confuse.

Instead, we need the timestamp of a feature's inception.

We should revisit once web-platform-dx/web-features#714
is tackled.

Author: jcscottiii

e2e/tests/stats-page.spec.ts-snapshots/matches-the-screenshot-1-chromium-linux.png

@@ -159,7 +159,6 @@ export class StatsPage extends BaseChartsPage {
       }
       this.globalFeatureSupportChartDataObj = this.createDisplayDataFromMap(
         this.globalFeatureSupport,
-        true,
       );
     });
     await Promise.all(promises); // Wait for all browsers to finish
@@ -189,7 +188,6 @@ export class StatsPage extends BaseChartsPage {
       }
       this.missingOneImplementationChartDataObj = this.createDisplayDataFromMap(
         this.missingOneImplementationMap,
-        false,
       );
     });
     await Promise.all(promises); // Wait for all browsers to finish
@@ -253,7 +251,6 @@ export class StatsPage extends BaseChartsPage {
   // and stats page, https://github.com/GoogleChrome/webstatus.dev/issues/964.
   createDisplayDataFromMap(
     targetMap: Map<string, Array<BrowserReleaseFeatureMetric>>,
-    addMax: boolean,
   ): WebStatusDataObj {
     // Get the list of supported browsers.
     const browsers = this.supportedBrowsers;
@@ -263,9 +260,6 @@ export class StatsPage extends BaseChartsPage {
     for (const browser of browsers) {
       dataObj.cols.push({type: 'number', label: browser, role: 'data'});
     }
-    if (addMax) {
-      dataObj.cols.push({type: 'number', label: 'Max features', role: 'data'});
-    }
 
     // Map from date to an object with counts for each browser
     const dateToBrowserDataMap = new Map<number, {[key: string]: number}>();
@@ -301,17 +295,7 @@ export class StatsPage extends BaseChartsPage {
         browser => browserCounts[browser] || null,
       );
 
-      if (addMax) {
-        let maxCount = 0;
-        for (const count of browserCountArray) {
-          if (count) {
-            maxCount = Math.max(maxCount, count);
-          }
-        }
-        dataObj.rows.push([date, ...browserCountArray, maxCount]);
-      } else {
-        dataObj.rows.push([date, ...browserCountArray]);
-      }
+      dataObj.rows.push([date, ...browserCountArray]);
     }
     return dataObj;
   }
@@ -380,7 +364,7 @@ export class StatsPage extends BaseChartsPage {
     return html`
       <webstatus-gchart
         id="global-feature-support-chart"
-        .hasMax=${true}
+        .hasMax=${false}
         .containerId="${'global-feature-support-chart-container'}"
         .chartType="${'LineChart'}"
         .dataObj="${this.globalFeatureSupportChartDataObj}"