Remove extra parentheses from TOC.

Author: ryanwilson

Interop/Firebase Component System.md

@@ -14,8 +14,8 @@ the implementing SDK is included.
 - [Registering with Core](#registering-with-core)
     - [Singletons and Instance Management](#singletons-and-instance-management)
         - [Single Instance per `FIRApp`](#single-instance-per-firapp)
-            - [SDK does not provide functionality (example: Functions)](#sdk-does-not-provide-functionality-\(example:-functions\))
-            - [SDK provides functionality to other SDKs (example: Auth)](#sdk-provides-functionality-to-other-SDKs-\(example:-auth\))
+            - [SDK does not provide functionality (example: Functions)](#sdk-does-not-provide-functionality-(example:-functions))
+            - [SDK provides functionality to other SDKs (example: Auth)](#sdk-provides-functionality-to-other-SDKs-(example:-auth))
         - [Multiple Instances per FIRApp](#multiple-instances-per-firapp)
     - [Depending on Functionality from Another SDK](#depending-on-functionality-from-another-sdk)
 - [Advanced Use Cases](#advanced-use-cases)