fix(nvim): drop the last nvim-cmp dependency from lsp-config

Capabilities already come from blink.cmp, so cmp-nvim-lsp only kept a dead plugin installed. Also ignore oh-my-claudecode's .omc session state.

.gitignore

@@ -49,3 +49,6 @@ luac.out
 .DS_Store
 /Screenshots/*
 .env
+
+# oh-my-claudecode session state
+.omc/

lua/absolute/plugins/lsp-config.lua

@@ -2,10 +2,6 @@ return {
     "neovim/nvim-lspconfig",
     event = { "BufReadPre", "BufNewFile" },
     dependencies = {
-        {
-            "hrsh7th/cmp-nvim-lsp",
-            name = "nvim_lsp",
-        },
         {
             "antosha417/nvim-lsp-file-operations",
             config = true,