[2016.3] Remove "Targeting with Executions" section from docs (#36926)
[2016.3] Remove "Targeting with Executions" section from docs (#36926)

The targeting docs were refactored in the 2016.3 branch compared to
the 2015.8 branch. This fixes #36906 for the 2016.3 branch and newer.

Refs #36925
saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt