Avoid disabling lsp formatting capabilities

this was used so we could use null-ls as default formatter but as its dead i have replaced it with conform in the example_config. check a321ba986d

lua/plugins/configs/lspconfig.lua

@@ -7,9 +7,6 @@ local utils = require "core.utils"
 -- export on_attach & capabilities for custom lspconfigs
 
 M.on_attach = function(client, bufnr)
-  client.server_capabilities.documentFormattingProvider = false
-  client.server_capabilities.documentRangeFormattingProvider = false
-
   utils.load_mappings("lspconfig", { buffer = bufnr })
 
   if client.server_capabilities.signatureHelpProvider then