Summary
-------

Remove 3 methods: ModuleAttributeBuilder.build, CodeRelabeler.relabel, and ConstantPoolBuilder.writeBootstrapMethods from the Class-File API.

Problem
-------

These 3 methods are only meaningful to the implementation, is not used by any client. They can be used by the implementation without exposure in the API. They would be extra implementation burden if we keep them exposed.

Solution
--------

Remove these 3 methods from the public API.

Specification
-------------

    diff --git a/src/java.base/share/classes/java/lang/classfile/attribute/ModuleAttribute.java b/src/java.base/share/classes/java/lang/classfile/attribute/ModuleAttribute.java
    index 721719d2851..9a4c58478ad 100644
    --- a/src/java.base/share/classes/java/lang/classfile/attribute/ModuleAttribute.java
    +++ b/src/java.base/share/classes/java/lang/classfile/attribute/ModuleAttribute.java
    @@ -319,11 +319,5 @@ default ModuleAttributeBuilder opens(PackageDesc pkge, Collection<AccessFlag> op
              * @return this builder
              */
             ModuleAttributeBuilder provides(ModuleProvideInfo provides);
    -
    -        /**
    -         * Builds module attribute.
    -         * @return the module attribute
    -         */
    -        ModuleAttribute build();
         }
     }
    diff --git a/src/java.base/share/classes/java/lang/classfile/components/CodeRelabeler.java b/src/java.base/share/classes/java/lang/classfile/components/CodeRelabeler.java
    index a0ef4d4de9c..ca5ad90389c 100644
    --- a/src/java.base/share/classes/java/lang/classfile/components/CodeRelabeler.java
    +++ b/src/java.base/share/classes/java/lang/classfile/components/CodeRelabeler.java
    @@ -74,12 +74,4 @@ static CodeRelabeler of(Map<Label, Label> map) {
         static CodeRelabeler of(BiFunction<Label, CodeBuilder, Label> mapFunction) {
             return new CodeRelabelerImpl(mapFunction);
         }
    -
    -    /**
    -     * Access method to internal re-labeling function.
    -     * @param label source label
    -     * @param codeBuilder builder to create new labels
    -     * @return target label
    -     */
    -    Label relabel(Label label, CodeBuilder codeBuilder);
     }
    diff --git a/src/java.base/share/classes/java/lang/classfile/constantpool/ConstantPoolBuilder.java b/src/java.base/share/classes/java/lang/classfile/constantpool/ConstantPoolBuilder.java
    index db388c1c73b..a43e6f102ed 100644
    --- a/src/java.base/share/classes/java/lang/classfile/constantpool/ConstantPoolBuilder.java
    +++ b/src/java.base/share/classes/java/lang/classfile/constantpool/ConstantPoolBuilder.java
    @@ -92,14 +92,6 @@ static ConstantPoolBuilder of() {
          */
         boolean canWriteDirect(ConstantPool constantPool);
     
    -    /**
    -     * Writes associated bootstrap method entries to the specified writer
    -     *
    -     * @param buf the writer
    -     * @return false when no bootstrap method entry has been written
    -     */
    -    boolean writeBootstrapMethods(BufWriter buf);
    -
         /**
          * {@return A {@link Utf8Entry} describing the provided {@linkplain String}}
          * If a UTF8 entry in the pool already describes this string, it is returned;