Remove quarry_dig_above_nodes (#359)

Author: imre84

README.md

@@ -140,7 +140,6 @@ Recommended mods that build on the `technic mod`:
 | admin_priv                                   | Privileges required to use administrative chat commands like cache flushing and enabling/disabling machines globally. |
 | quarry_max_depth                             | max depth of the quarry.                                                                                              |
 | quarry_time_limit                            | max cpu time in μs allowed per quarry step.                                                                           |
-| quarry_dig_above_nodes                       | begin digging this many nodes above quarry node.                                                                      |
 | quarry_dig_particles                         | Enables particle effect with the quarry digs a node.                                                                  |
 | network_overload_reset_time                  | After network conflict wait this many seconds before attempting to activate conflicting networks again.               |
 | switch_off_delay_seconds                     | switching station off delay.                                                                                          |

technic/spec/fixtures/technic.conf

@@ -13,7 +13,6 @@ multimeter_remote_start_ttl = 300
 
 enable_wind_mill = true
 enable_nuclear_reactor_digiline_selfdestruct = true
-quarry_dig_above_nodes = 3
 quarry_max_depth = 100
 quarry_time_limit = 5000