chore: typo in document-load instrumentation (#2980)

Author: overbalance

packages/instrumentation-document-load/test/documentLoad.test.ts

@@ -207,8 +207,6 @@ const paintEntries: PerformanceEntryList = [
   },
 ];
 
-performance.getEntriesByType;
-
 const userAgent =
   'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.149 Safari/537.36';