8212137: Remove JrtFileSystem finalize method

Reviewed-by: alanb

src/java.base/share/classes/jdk/internal/jrtfs/JrtFileSystem.java

@@ -105,14 +105,6 @@ class JrtFileSystem extends FileSystem {
         cleanup();
     }
 
-    @Override
-    @SuppressWarnings("deprecation")
-    protected void finalize() throws Throwable {
-        try {
-            cleanup();
-        } catch (IOException ignored) {}
-    }
-
     @Override
     public FileSystemProvider provider() {
         return provider;