Remove declaration of remove_statements_from_block method (#1508)

The definition was removed in 7e0b167

src/visitors/visitor_utils.hpp

@@ -82,11 +82,6 @@ std::shared_ptr<ast::StatementBlock> create_statement_block(
     const std::vector<std::string>& code_statements);
 
 
-///  Remove statements from given statement block if they exist
-void remove_statements_from_block(ast::StatementBlock& block,
-                                  const std::set<ast::Node*>& statements);
-
-
 /// Return set of strings with the names of all global variables
 std::set<std::string> get_global_vars(const ast::Program& node);