Remove ROS1

[griswaldbrooks]

Need

In order to simplify the repo
As a developer looking for examples
I want to only see the ros2 examples

Acceptance Criteria

Scenario: repo should only have ros2 examples
GIVEN developer checks out the repo
WHEN they look at the list of branches
THEN the main branch will be for ros2
AND there will be no ros1 branch

Tasks

• remove ros1 branch
• rename ros2 branch to main

Notes

There isn't a need to maintain a ROS1 branch anymore and it's just extra

References: