docs: remove IE10 references from comments in the code (#39090)

PR Close #39090

packages/common/src/i18n/format_date.ts

@@ -667,7 +667,7 @@ function getDateFormatter(format: string): DateFormatter|null {
 }
 
 function timezoneToOffset(timezone: string, fallback: number): number {
-  // Support: IE 9-11 only, Edge 13-15+
+  // Support: IE 11 only, Edge 13-15+
   // IE/Edge do not "understand" colon (`:`) in timezone
   timezone = timezone.replace(/:/g, '');
   const requestedTimezoneOffset = Date.parse('Jan 01, 1970 00:00:00 ' + timezone) / 60000;

packages/common/upgrade/src/location_shim.ts

@@ -689,7 +689,7 @@ export class $locationShim {
    *
    * This method is supported only in HTML5 mode and only in browsers supporting
    * the HTML5 History API methods such as `pushState` and `replaceState`. If you need to support
-   * older browsers (like IE9 or Android < 4.0), don't use this method.
+   * older browsers (like Android < 4.0), don't use this method.
    *
    */
   state(): unknown;