some optimizations

init.lua

@@ -1,9 +1,7 @@
-vim.api.nvim_exec ('language POSIX', true)
+vim.cmd('language POSIX')
 
 require('plugins')
--- require('mason-config')
 require('code-completion')
-require('file-explorer')
 require('mappings')
 
 vim.opt.tabstop = 2