Documentation/linux-quickstart: Remove outdated note

Java 8 is deprecated, and the recommended Java version is 11.

Change-Id: I75ceef18cd09102288e218b62253d37432cc670c
diff --git a/Documentation/linux-quickstart.txt b/Documentation/linux-quickstart.txt
index 29bb409..e34071f 100644
--- a/Documentation/linux-quickstart.txt
+++ b/Documentation/linux-quickstart.txt
@@ -19,8 +19,7 @@
 
 . A Unix-based server, including any Linux flavor, MacOS, or Berkeley Software
     Distribution (BSD).
-. Java SE Runtime Environment version 1.8. Gerrit is not compatible with Java
-    9 or newer yet.
+. Java SE Runtime Environment version 11 and up.
 
 == Download Gerrit