chore: remove unused from_box_ast generator.

Author: rzvxa

tasks/ast_codegen/src/generators/from_box_ast.rs

@@ -1,7 +1,6 @@
 mod ast;
 mod ast_builder;
 mod ast_kind;
-mod from_box_ast;
 mod impl_get_span;
 mod visit;
 
@@ -44,6 +43,5 @@ pub(crate) use insert;
 pub use ast::AstGenerator;
 pub use ast_builder::AstBuilderGenerator;
 pub use ast_kind::AstKindGenerator;
-pub use from_box_ast::FromBoxAstGenerator;
 pub use impl_get_span::ImplGetSpanGenerator;
 pub use visit::VisitGenerator;