[Usage] Remove usage tracker

nvim/lua/plugins/util/usage-tracker.lua

@@ -1,13 +0,0 @@
-return {
-    "gaborvecsei/usage-tracker.nvim",
-    config = function()
-        require("usage-tracker").setup({
-            keep_eventlog_days = 35,
-            cleanup_freq_days = 7,
-            event_wait_period_in_sec = 5,
-            inactivity_threshold_in_min = 2,
-            inactivity_check_freq_in_sec = 10,
-            verbose = 0,
-        })
-    end,
-}