refactor: try to remove dependency for plenary.curl

lua/Trans/core/setup.lua

@@ -3,22 +3,10 @@ return function(opts)
     if opts then
         M.conf = vim.tbl_deep_extend('force', M.conf, opts)
     end
-    local conf   = M.conf
+
     local set_hl = vim.api.nvim_set_hl
-    local hls    = require('Trans.style.theme')[conf.theme]
+    local hls    = require('Trans.style.theme')[M.conf.theme]
     for hl, opt in pairs(hls) do
         set_hl(0, hl, opt)
     end
-
-
-    local path = vim.fn.expand("$HOME/.vim/dict/Trans.json")
-    local file = io.open(path, "r")
-    if file then
-        local content = file:read("*a")
-        file:close()
-        local status, engine = pcall(vim.json.decode, content)
-        assert(status, 'Unable to parse json file: ' .. path)
-
-        conf.engine = engine
-    end
 end