chore(axiom): remove unnecessary function

Author: hahuja2

axiom/nr_errors.h

@@ -115,14 +115,6 @@ extern const char* nr_error_get_context(const nr_error_t* error);
  */
 extern int nr_error_get_no(const nr_error_t* error);
 
-/*
- * Purpose : Determine if the option is 0 or 1. If 1, then this means the error
- * has additional arguments.
- *
- * Returns : Either 0 or 1
- */
-extern int nr_error_get_option(const nr_error_t* error);
-
 /*
  * Purpose : Get the span_id of an error.
  *