Revert tokenizers (#423)

* Revert "fix: add missing "with" in README"

This reverts commit bf1e7f1f17.

* Revert "feat: tokenizers (#407)"

This reverts commit d2095ba267.

lua/avante/api.lua

@@ -10,7 +10,6 @@ local Utils = require("avante.utils")
 ---@field ask fun(): boolean
 ---@field edit fun(): nil
 ---@field refresh fun(): nil
----@field build fun(): boolean
 ---@field toggle avante.ApiToggle
 
 return setmetatable({}, {