shared/format-table: drop unused table_sync_column_widths()

The variadic pair-wise variant was only used by the hand-written help()
functions to synchronize their verb and option tables. Those are all
gone, and the verbs machinery uses table_sync_all_column_widths().

src/shared/format-table.c

@@ -2218,38 +2218,6 @@ int table_set_column_width(Table *t, size_t column, size_t width) {
         return r;
 }
 
-int _table_sync_column_widths(size_t column, Table *a, ...) {
-        size_t max = 0;
-        va_list ap;
-        int r = 0;
-
-        assert(a);
-
-        /* Make the specified column have the same width in the tables. */
-
-        va_start(ap, a);
-        for (Table *t = a; t; t = va_arg(ap, Table*)) {
-                size_t w;
-
-                r = table_data_requested_width(t, column, &w);
-                if (r < 0)
-                        break;
-
-                max = MAX(max, w);
-        }
-        va_end(ap);
-        if (r < 0)
-                return log_error_errno(r, "Failed to query table column width: %m");
-
-        r = 0;
-        va_start(ap, a);
-        for (Table *t = a; t; t = va_arg(ap, Table*))
-                RET_GATHER(r, table_set_column_width(t, column, max));
-        va_end(ap);
-
-        return r;
-}
-
 int table_sync_all_column_widths(size_t column, Table **a) {
         size_t max = 0;
         int r;

src/shared/format-table.h

@@ -147,8 +147,6 @@ int table_hide_column_from_display_internal(Table *t, ...);
 int table_data_requested_width(Table *table, size_t column, size_t *ret);
 
 int table_set_column_width(Table *t, size_t column, size_t width);
-int _table_sync_column_widths(size_t column, Table *a, ...);
-#define table_sync_column_widths(column, a, ...) _table_sync_column_widths(column, a, __VA_ARGS__, NULL)
 int table_sync_all_column_widths(size_t column, Table **a);
 
 int table_print_full(Table *t, FILE *f, bool flush);