Revert "[hector_exploration_planner]"

This reverts commit 9c004c5df281abb991d60c53c6441a5e1f61496b.
Revert "[hector_exploration_planner]"

This reverts commit 4a779989f6654ac3c39b78f0fb5bbbfc7f4592c9.
Revert "[hector_exploration_planner]"

This reverts commit 45d4e444a7853a1470621a30031e7d6a0b9dab79.
Revert "[hector_exploration_planner]"

This reverts commit 7f917ff1dc8c4c280aa5d50e8ea51a6d9f67e7d0.
Revert "[hector_exploration_planner]"

This reverts commit 2aa12dc62246a49bdfa67287161ad9a617489a9b.
Revert "[hector_exploration_planner]"

This reverts commit 13ed3e76748f408c1541bb215e57358aa0d2744c.
Revert "[hector_exploration_planner]"

This reverts commit afd72accbad6dc909fbee2fcd54ae4c50c681169.
Revert "[hector_exploration_planner]"

This reverts commit f551a1a3715dee08ae97c46c6f64614bafa16100.