Revert "Changes to advertise OSType while registering the container instance with cluster"
Revert "Changes to advertise OSType while registering the container instance with cluster"

This reverts commit 2d0efc8a052533aced2b9221a66ca588970f3cf4.

swipely/amazon-ecs-agent,aws/amazon-ecs-agent,swipely/amazon-ecs-agent,kiranmeduri/amazon-ecs-agent,swipely/amazon-ecs-agent,swipely/amazon-ecs-agent,kiranmeduri/amazon-ecs-agent,aws/amazon-ecs-agent,aws/amazon-ecs-agent,kiranmeduri/amazon-ecs-agent,kiranmeduri/amazon-ecs-agent,aws/amazon-ecs-agent