Delete buffer stretchy functions

A buffer should be a strictly sized array representing a file in
memory.  No dynamic size functions.

lib.c

@@ -13,7 +13,6 @@ buffer_t *buffer_init_str(const char *name, const char *str, size_t str_size)
   buffer_t *buf = malloc(sizeof(*buf) + str_size + 1);
   buf->name     = name;
   buf->size     = str_size;
-  buf->capacity = str_size;
   if (str)
   {
     memcpy(buf->data, str, str_size);
@@ -22,47 +21,6 @@ buffer_t *buffer_init_str(const char *name, const char *str, size_t str_size)
   return buf;
 }
 
-bool buffer_ensure(buffer_t **buffer, u64 expected)
-{
-  if (!buffer)
-    return false;
-  else if (!*buffer)
-  {
-    *buffer = buffer_init_str(NULL, NULL, expected);
-  }
-  else if (buffer[0]->capacity <= expected)
-  {
-    buffer[0]->capacity = MAX(buffer[0]->capacity * 2, expected);
-    *buffer = realloc(*buffer, sizeof(**buffer) + buffer[0]->capacity);
-  }
-  return true;
-}
-
-bool buffer_ensure_relative(buffer_t **buffer, u64 expected)
-{
-  return buffer_ensure(buffer,
-                       buffer && *buffer ? buffer[0]->size + expected : 0);
-}
-
-bool buffer_append(buffer_t **buffer, u8 datum)
-{
-  bool ret = buffer_ensure_relative(buffer, 1);
-  if (ret)
-    buffer[0]->data[buffer[0]->size++] = datum;
-  return ret;
-}
-
-bool buffer_append_bytes(buffer_t **buffer, u8 *data, u64 size)
-{
-  bool ret = buffer_ensure_relative(buffer, size);
-  if (ret)
-  {
-    memcpy(buffer[0]->data + buffer[0]->size, data, size);
-    buffer[0]->size += size;
-  }
-  return ret;
-}
-
 void print_error(const char *handle, size_t row, size_t column,
                  const char *reason)
 {

lib.h

@@ -29,13 +29,9 @@ void print_error(const char *handle, size_t row, size_t column,
 typedef struct Buffer
 {
   const char *name;
-  u64 size, capacity;
+  u64 size;
   u8 data[];
 } buffer_t;
 
 buffer_t *buffer_init_str(const char *name, const char *str, size_t str_size);
-bool buffer_ensure(buffer_t **buffer, u64 expected);
-bool buffer_ensure_relative(buffer_t **buffer, u64 expected);
-bool buffer_append(buffer_t **buffer, u8 datum);
-bool buffer_append_bytes(buffer_t **buffer, u8 *data, u64 size);
 #endif