docs/control/README.md: Fix MD051 warnings
The following warnings are generated by using markdownlint analysis:
```
docs/control/README.md:7:3 MD051/link-fragments Link fragments should be valid [Context: "[Example](#example)"]
```
Signed-off-by: George Liu <liuxiwei@ieisystem.com>
Change-Id: I3a1e38966509b1490640018415b40df2f2233c7e
diff --git a/docs/control/README.md b/docs/control/README.md
index 197c873..c4bbd08 100644
--- a/docs/control/README.md
+++ b/docs/control/README.md
@@ -4,7 +4,6 @@
- [Overview](#overview)
- [Data Format](#data-format)
-- [Example](#example)
- [System Config Location](#system-config-location)
- [Contents](#contents)
- [Validation](#validation)