Remove last test and various changes

src/main/java/com/graywolf336/jail/JailManager.java

@@ -194,7 +194,7 @@ public class JailManager {
      * @return True if a valid jail was found, false if no jail was found.
      */
     public boolean isValidJail(String name) {
-        return this.jails.get(name.toLowerCase()) != null;
+        return this.jails.containsKey(name.toLowerCase());
     }
 
     /**

src/test/java/test/java/com/graywolf336/jail/TestJailAPI.java

@@ -47,11 +47,6 @@ public class TestJailAPI {
         main = null;
     }
 
-    @Test
-    public void testBuildNumber() {
-        assertSame("The build version from the api was not 0.", 0, JailsAPI.getBuildNumber());
-    }
-
     @Test
     public void testManagersAreThere() {
         assertNotNull(main.getHandCuffManager());