Strip pre-java-9 version check in Metrics as Velocity targets 21+

proxy/src/main/java/com/velocitypowered/proxy/Metrics.java

@@ -126,27 +126,16 @@ static void startMetrics(VelocityServer server, VelocityConfiguration.Metrics me
         entry.put(javaVersion, 1);
 
         // http://openjdk.java.net/jeps/223
-        // Java decided to change their versioning scheme and in doing so modified the
-        // java.version system property to return $major[.$minor][.$security][-ea], as opposed to
-        // 1.$major.0_$identifier we can handle pre-9 by checking if the "major" is equal to "1",
-        // otherwise, 9+
+        // The java.version system property returns $major[.$minor][.$security][-ea].
         String majorVersion = javaVersion.split("\\.")[0];
-        String release;
-
-        int indexOf = javaVersion.lastIndexOf('.');
-
-        if (majorVersion.equals("1")) {
-          release = "Java " + javaVersion.substring(0, indexOf);
-        } else {
-          // of course, it really wouldn't be all that simple if they didn't add a quirk, now
-          // would it valid strings for the major may potentially include values such as -ea to
-          // denote a pre release
-          Matcher versionMatcher = Pattern.compile("\\d+").matcher(majorVersion);
-          if (versionMatcher.find()) {
-            majorVersion = versionMatcher.group(0);
-          }
-          release = "Java " + majorVersion;
+
+        // valid strings for the major may potentially include values such as -ea to denote a
+        // pre-release
+        Matcher versionMatcher = Pattern.compile("\\d+").matcher(majorVersion);
+        if (versionMatcher.find()) {
+          majorVersion = versionMatcher.group(0);
         }
+        String release = "Java " + majorVersion;
         map.put(release, entry);
 
         return map;