nvim: lsp: Drop support for lua

We had added lua-language-server thinking it would be helpful for
Wireplumber development, but, due to the nature of lua and server
itself, the experience is utter crap in comparison to using LSP in
other languages.

nvim/.config/nvim/lua/lsp.lua

@@ -148,46 +148,6 @@ local on_attach = function(client, bufnr)
   vim.cmd [[autocmd CursorHold,CursorHoldI <buffer> lua require'nvim-lightbulb'.update_lightbulb()]]
 end
 
--- See https://github.com/sumneko/lua-language-server/wiki/Setting-without-VSCode#neovim-with-built-in-lsp-client
--- on why we do this library thing
--- Idea taken from https://gist.github.com/folke/fe5d28423ea5380929c3f7ce674c41d8
-local determine_setup_lua = function ()
-  local library = {}
-  local cwd = vim.fn.getcwd()
-
-  local add_to_library = function(lib_path)
-      for _, p in pairs(vim.fn.expand(lib_path, false, true)) do
-      p = vim.loop.fs_realpath(p)
-      library[p] = true
-    end
-  end
-
-  if string.find(cwd, "neovim") then
-    add_to_library("$VIMRUNTIME")
-  elseif string.find(cwd, "dotfiles") then
-    add_to_library("$VIMRUNTIME")
-    add_to_library("~/.config/nvim")
-    add_to_library("~/.local/share/nvim/site/pack/packer/opt/*")
-    add_to_library("~/.local/share/nvim/site/pack/packer/start/*")
-  else
-    add_to_library(cwd .. "/*")
-  end
-
-  local runtime_path = vim.split(package.path, ';')
-  table.insert(runtime_path, "lua/?.lua")
-  table.insert(runtime_path, "lua/?/init.lua")
-
-  local lua_version = function()
-    if string.find(cwd, "neovim") or string.find(cwd, "dotfiles") then
-      return "LuaJIT"
-    else
-      return "Lua 5.4"
-    end
-  end
-
-  return library, runtime_path, lua_version()
-end
-
 local capabilities = vim.lsp.protocol.make_client_capabilities()
 capabilities = cmp.update_capabilities(capabilities)
 
@@ -253,33 +213,6 @@ nvim_lsp.clangd.setup {
 
 require('rust-tools').setup(rust_tool_opts)
 
-local library, runtime_path, lua_version = determine_setup_lua()
-nvim_lsp.sumneko_lua.setup {
-  cmd          = { "/usr/bin/lua-language-server" };
-  on_attach    = on_attach,
-  capabilities = capabilities,
-  settings = {
-    Lua = {
-      runtime = {
-        version = lua_version,
-        path    = runtime_path,
-      },
-      completion = { callSnippet = "Both" },
-      diagnostics = {
-        globals = {'vim'},
-      },
-      workspace = {
-        library         = library,
-        maxPreload      = 2000,
-        preloadFileSize = 50000
-      },
-      telemetry = {
-        enable = false,
-      },
-    },
-  },
-}
-
 nvim_lsp.tsserver.setup {
   init_options = require("nvim-lsp-ts-utils").init_options,
   on_attach    = on_attach,