fix: rm unused files

nvim/lua/plugins/conform.lua

@@ -3,7 +3,7 @@ return {
 		"stevearc/conform.nvim",
 		opts = {
 			formatters_by_ft = {
-				go = { "gofmt"},
+				go = { "goimports"},
 			}
 		}
 	}

nvim/lua/plugins/lspsaga.lua

@@ -1,12 +0,0 @@
-return {
-	{
-		'nvimdev/lspsaga.nvim',
-		config = function()
-			require('lspsaga').setup({})
-		end,
-		dependencies = {
-			'nvim-treesitter/nvim-treesitter',
-			'nvim-tree/nvim-web-devicons'     -- optional
-		}
-	}
-}