Remove parser_show_error_line

parse.y

@@ -7443,23 +7443,6 @@ parser_precise_mbclen(struct parser_params *p, const char *ptr)
 }
 
 #ifndef RIPPER
-static inline void
-parser_show_error_line(struct parser_params *p, const YYLTYPE *yylloc)
-{
-    rb_parser_string_t *str;
-    int lineno = p->ruby_sourceline;
-    if (!yylloc) {
-        return;
-    }
-    else if (yylloc->beg_pos.lineno == lineno) {
-        str = p->lex.lastline;
-    }
-    else {
-        return;
-    }
-    ruby_show_error_line(p, p->error_buffer, Qnil, yylloc, lineno, str);
-}
-
 static int
 parser_yyerror(struct parser_params *p, const rb_code_location_t *yylloc, const char *msg)
 {
@@ -16260,7 +16243,9 @@ parser_compile_error(struct parser_params *p, const rb_code_location_t *loc, con
                                p->ruby_sourcefile_string,
                                lineno, column,
                                p->enc, fmt, ap);
-        parser_show_error_line(p, loc);
+        if (lastline) {
+            ruby_show_error_line(p, p->error_buffer, Qnil, loc, lineno, lastline);
+        }
     }
     else {
         VALUE str = rb_enc_str_new(0, 0, p->enc);