README: drop TOC

Drop TOC element as github doesn't recognize it.

Change-Id: I9ba4cc6119e67d5221d15fe44bc89bed6c31a3bb
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/README.md b/README.md
index 6c34c9e..475d662 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,5 @@
 # phosphor-pid-control
 
-[TOC]
-
 ## Objective
 
 Develop a tray level fan control system that will use exhaust temperature and