Revert "more init time in cpu test"

This reverts commit 76dcc65b31a7b03c8f48b92e5bc537397f847f3e.

old-commit-hash: b29d9da875

selfdrive/test/test_cpu_usage.py

@@ -79,7 +79,7 @@ def test_cpu_usage():
       time.sleep(2)
 
     # take first sample
-    time.sleep(30)
+    time.sleep(5)
     first_proc = messaging.recv_sock(proc_sock, wait=True)
     if first_proc is None:
       raise Exception("\n\nTEST FAILED: progLog recv timed out\n\n")