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/main/java/com/graywolf336/jail/command/subcommands/JailCheckCommand.java

@@ -24,7 +24,7 @@ import com.graywolf336.jail.enums.Lang;
         permission = "jail.command.jailcheck",
         usage = "/jail check [name]"
         )
-public class JailCheckCommand implements Command{
+public class JailCheckCommand implements Command {
 
     // Checks the status of the specified prisoner
     public boolean execute(JailManager jm, CommandSender sender, String... args) {

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

@@ -46,11 +46,6 @@ public class TestJailAPI {
         creator.tearDown();
         main = null;
     }
-    
-    @Test
-    public void testBuildNumber() {
-        assertSame("The build version from the api was not 0.", 0, JailsAPI.getBuildNumber());
-    }
 
     @Test
     public void testManagersAreThere() {