fix(default-options): remove invalid guifont option (#4447)

fix(default-options): remove invalid guifont

Signed-off-by: weiyang <weiyang.ones@gmail.com>

lua/lvim/config/settings.lua

@@ -19,7 +19,6 @@ M.load_default_options = function()
     fileencoding = "utf-8", -- the encoding written to a file
     foldmethod = "manual", -- folding, set to "expr" for treesitter based folding
     foldexpr = "", -- set to "nvim_treesitter#foldexpr()" for treesitter based folding
-    guifont = "monospace:h17", -- the font used in graphical neovim applications
     hidden = true, -- required to keep multiple buffers and open multiple buffers
     hlsearch = true, -- highlight all matches on previous search pattern
     ignorecase = true, -- ignore case in search patterns