Enable and fix 'Statement unnecessarily nested within else clause' warnings

Change-Id: Ida6df4593fc2ab3c11581309b2b4a638229ea093
diff --git a/gerrit-main/src/main/java/Main.java b/gerrit-main/src/main/java/Main.java
index 54cf20e..a29f1c6 100644
--- a/gerrit-main/src/main/java/Main.java
+++ b/gerrit-main/src/main/java/Main.java
@@ -34,11 +34,10 @@
     if (1.7 <= parse(version)) {
       return true;
 
-    } else {
-      System.err.println("fatal: Gerrit Code Review requires Java 7 or later");
-      System.err.println("       (trying to run on Java " + version + ")");
-      return false;
     }
+    System.err.println("fatal: Gerrit Code Review requires Java 7 or later");
+    System.err.println("       (trying to run on Java " + version + ")");
+    return false;
   }
 
   private static double parse(String version) {