nvim: removed mason path override

lua/plugins/mason.lua

@@ -1,7 +0,0 @@
-return {
-    "mason.nvim",
-    opts = {
-        -- NixOS packages should override Mason packages if exist
-        PATH = vim.loop.os_uname().version:find("NixOS") and "append" or "prepend",
-    },
-}