restrict conform.nvim format on save to only specific filetypes

lua/plugins/lsp.lua

@@ -1,29 +1,3 @@
-local augroup = vim.api.nvim_create_augroup("LspFormatting", {})
-local format_on_save = function(client, bufnr)
-    if client.supports_method("textDocument/formatting") then
-        vim.api.nvim_clear_autocmds({
-            group = augroup,
-            buffer = bufnr,
-        })
-        vim.api.nvim_create_autocmd("BufWritePre", {
-            group = augroup,
-            buffer = bufnr,
-            callback = function()
-                -- prevents format from being included in the undo history
-                -- this way the cursor doesn't jump around the file when
-                -- undoing
-                vim.cmd("silent! undojoin")
-
-                vim.lsp.buf.format({
-                    bufnr = bufnr,
-                    async = false,
-                })
-            end,
-        })
-    end
-end
-
-
 vim.diagnostic.config({
     virtual_lines = false,
     virtual_text = false,
@@ -91,9 +65,6 @@ return {
             local null_ls = require("null-ls")
 
             null_ls.setup({
-                on_attach = function(client, bufnr)
-                    format_on_save(client, bufnr)
-                end,
                 sources = {
                     null_ls.builtins.diagnostics.dotenv_linter,
                     null_ls.builtins.diagnostics.editorconfig_checker,