Undo toc addition to README.

Author: kevinzakka

README.md

@@ -118,28 +118,16 @@ Visualizing a robot description:
 
 Available robot descriptions ([gallery](https://github.com/robot-descriptions/awesome-robot-descriptions#gallery)) are listed in the following categories:
 
-- [Installation](#installation)
-  - [From conda-forge](#from-conda-forge)
-  - [From PyPI](#from-pypi)
-- [Usage](#usage)
-  - [Show a description](#show-a-description)
-  - [Import as submodule](#import-as-submodule)
-- [Examples](#examples)
-- [Descriptions](#descriptions)
-  - [Arms](#arms)
-  - [Bipeds](#bipeds)
-  - [Dual arms](#dual-arms)
-  - [Drones](#drones)
-  - [Educational](#educational)
-  - [End effectors](#end-effectors)
-  - [Humanoids](#humanoids)
-  - [Mobile manipulators](#mobile-manipulators)
-  - [Quadrupeds](#quadrupeds)
-  - [Wheeled](#wheeled)
-- [Contributing](#contributing)
-- [Thanks](#thanks)
-- [Citation](#citation)
-- [See also](#see-also)
+- [Arms](#arms)
+- [Bipeds](#bipeds)
+- [Dual arms](#dual-arms)
+- [Drones](#drones)
+- [Educational](#educational)
+- [End effectors](#end-effectors)
+- [Humanoids](#humanoids)
+- [Mobile manipulators](#mobile-manipulators)
+- [Quadrupeds](#quadrupeds)
+- [Wheeled](#wheeled)
 
 The DOF column denotes the number of actuated degrees of freedom.