nvim: move rustaceanvim to lsp.rust

.config/nvim/plugin/lsp.lua

@@ -186,22 +186,3 @@ vim.api.nvim_create_autocmd("FileType", {
     callback = function() require("metals").initialize_or_attach(metals_config) end,
     group = nvim_metals_group,
 })
-
-----------
--- Rust --
-----------
-vim.g.rustaceanvim = {
-    server = {
-        on_attach = mylsp.on_attach,
-        settings = {
-            ["rust-analyzer"] = { files = { excludeDirs = { ".direnv/" } } },
-        },
-    },
-    tools = {
-        hover = {
-            border = border,
-            stylize_markdown = true,
-        },
-        log = { level = vim.log.levels.OFF },
-    },
-}