Do not link duplicate method in javadoc.

scaladoc fails on that.

engine/runtime-parser-processor/src/main/java/org/enso/runtime/parser/processor/methodgen/CopyMethodGenerator.java

@@ -19,7 +19,7 @@ public String generateMethodCode() {
          * Creates a shallow copy of this IR element. If all of the given parameters are the
          * same objects as fields, no copy is created and {@code this} is returned.
          *
-         * <p>As opposed to the {@link #duplicate(boolean, boolean, boolean, boolean)} method,
+         * <p>As opposed to the {@code duplicate} method,
          * does not copy this IR element recursively.
          */
         """;