getting rid of tabs, adding nullls for sql, and adding telescope preview back in

after/plugin/barbar.lua

@@ -1,9 +0,0 @@
-local map = vim.api.nvim_set_keymap
-local opts = { noremap = true, silent = true }
-
--- Move to previous/next
-map('n', '<C-,>', ':BufferPrevious<CR>', opts)
-map('n', '<C-.>', ':BufferNext<CR>', opts)
-
--- close current buffer
-map('n', '<C-x>', ':BufferClose<CR>', opts)

after/plugin/null-ls.lua

@@ -1,6 +1,12 @@
 local null_ls = require("null-ls")
 
 null_ls.setup({
-    sources = {
-    },
+  sources = {
+    -- sql lint
+    null_ls.builtins.diagnostics.sqlfluff.with({
+      extra_args = { "--dialect", "postgres" },   -- change to your dialect
+    }),
+    -- postgres format
+    null_ls.builtins.formatting.pg_format
+  },
 })

after/plugin/telescope.lua

@@ -1,14 +1,10 @@
 local builtin = require('telescope.builtin')
 
 require('telescope').setup {
-    defaults = {
-        preview = false,
-    },
+  defaults = {
+  },
 }
 
--- disable preview in telescope
-vim.g.telescope_previewer_enable = false
-
 vim.keymap.set('n', '<leader>ff', builtin.git_files, {})
 vim.keymap.set('n', '<leader>ww', builtin.live_grep, {})
 vim.keymap.set('n', '<leader>sr', builtin.lsp_references, {})