8260959: remove RECORDS from PreviewFeature.Feature enum

Reviewed-by: jlahoda

src/java.base/share/classes/jdk/internal/javac/PreviewFeature.java

@@ -54,12 +54,6 @@ public @interface PreviewFeature {
     public boolean reflective() default false;
 
     public enum Feature {
-        // The RECORDS enum constant is not used in the JDK 16 codebase, but
-        // exists to support the bootcycle build of JDK 16. The bootcycle build
-        // of JDK 16 is performed with JDK 15 and the PreviewFeature type from
-        // JDK 16. Since the JDK 15 codebase uses the enum constant, it is
-        // necessary for PreviewFeature in JDK 16 to declare the enum constant.
-        RECORDS,
         SEALED_CLASSES,
         /**
          * A key for testing.