Remove unused functions from `struct rb_parser_config_struct`

ruby_parser.c

@@ -195,12 +195,6 @@ enc_codelen(int c, void *enc)
     return rb_enc_codelen(c, (rb_encoding *)enc);
 }
 
-static VALUE
-enc_str_buf_cat(VALUE str, const char *ptr, long len, void *enc)
-{
-    return rb_enc_str_buf_cat(str, ptr, len, (rb_encoding *)enc);
-}
-
 static int
 enc_mbcput(unsigned int c, void *buf, void *enc)
 {
@@ -460,8 +454,6 @@ static const rb_parser_config_t rb_global_parser_config = {
     .str_cat_cstr = rb_str_cat_cstr,
     .str_subseq = rb_str_subseq,
     .str_new_frozen = rb_str_new_frozen,
-    .str_buf_new = rb_str_buf_new,
-    .str_buf_cat = rb_str_buf_cat,
     .str_modify = rb_str_modify,
     .str_set_len = rb_str_set_len,
     .str_cat = rb_str_cat,
@@ -471,8 +463,6 @@ static const rb_parser_config_t rb_global_parser_config = {
     .str_to_interned_str = rb_str_to_interned_str,
     .is_ascii_string = is_ascii_string2,
     .enc_str_new = enc_str_new,
-    .enc_str_buf_cat = enc_str_buf_cat,
-    .str_buf_append = rb_str_buf_append,
     .str_vcatf = rb_str_vcatf,
     .string_value_cstr = rb_string_value_cstr,
     .rb_sprintf = rb_sprintf,

rubyparser.h

@@ -1284,8 +1284,6 @@ typedef struct rb_parser_config_struct {
     VALUE (*str_cat_cstr)(VALUE str, const char *ptr);
     VALUE (*str_subseq)(VALUE str, long beg, long len);
     VALUE (*str_new_frozen)(VALUE orig);
-    VALUE (*str_buf_new)(long capa);
-    VALUE (*str_buf_cat)(VALUE, const char*, long);
     void (*str_modify)(VALUE str);
     void (*str_set_len)(VALUE str, long len);
     VALUE (*str_cat)(VALUE str, const char *ptr, long len);
@@ -1295,8 +1293,6 @@ typedef struct rb_parser_config_struct {
     VALUE (*str_to_interned_str)(VALUE);
     int (*is_ascii_string)(VALUE str);
     VALUE (*enc_str_new)(const char *ptr, long len, rb_encoding *enc);
-    VALUE (*enc_str_buf_cat)(VALUE str, const char *ptr, long len, rb_encoding *enc);
-    VALUE (*str_buf_append)(VALUE str, VALUE str2);
     RBIMPL_ATTR_FORMAT(RBIMPL_PRINTF_FORMAT, 2, 0)
     VALUE (*str_vcatf)(VALUE str, const char *fmt, va_list ap);
     char *(*string_value_cstr)(volatile VALUE *ptr);

universal_parser.c

@@ -125,9 +125,6 @@
 #define rb_str_cat_cstr                   p->config->str_cat_cstr
 #define rb_str_subseq                     p->config->str_subseq
 #define rb_str_new_frozen                 p->config->str_new_frozen
-#define rb_str_buf_new                    p->config->str_buf_new
-#undef rb_str_buf_cat
-#define rb_str_buf_cat                    p->config->str_buf_cat
 #define rb_str_modify                     p->config->str_modify
 #define rb_str_set_len                    p->config->str_set_len
 #define rb_str_cat                        p->config->str_cat
@@ -139,8 +136,6 @@
 #define rb_str_to_interned_str            p->config->str_to_interned_str
 #define is_ascii_string                   p->config->is_ascii_string
 #define rb_enc_str_new                    p->config->enc_str_new
-#define rb_enc_str_buf_cat                p->config->enc_str_buf_cat
-#define rb_str_buf_append                 p->config->str_buf_append
 #define rb_str_vcatf                      p->config->str_vcatf
 #undef StringValueCStr
 #define StringValueCStr(v)                p->config->string_value_cstr(&(v))