Remove Carve boolean

We've got quite comprehensive BMesh based implementation, which is way easier
for maintenance than abandoned Carve library.

After all the time BMesh implementation was working on the same level of
limitations about manifold meshes and touching edges than Carve. Is better
to focus on maintaining one boolean implementation now.

Reviewers: campbellbarton

Reviewed By: campbellbarton

Differential Revision: https://developer.blender.org/D3050

CMakeLists.txt

@@ -310,7 +310,6 @@ endif()
 # Modifiers
 option(WITH_MOD_FLUID           "Enable Elbeem Modifier (Fluid Simulation)" ON)
 option(WITH_MOD_SMOKE           "Enable Smoke Modifier (Smoke Simulation)" ON)
-option(WITH_MOD_BOOLEAN         "Enable Boolean Modifier" ON)
 option(WITH_MOD_REMESH          "Enable Remesh Modifier" ON)
 # option(WITH_MOD_CLOTH_ELTOPO    "Enable Experimental cloth solver" OFF)  # this is now only available in a branch
 # mark_as_advanced(WITH_MOD_CLOTH_ELTOPO)
@@ -645,13 +644,12 @@ if(NOT WITH_BOOST)
 	set_and_warn(WITH_INTERNATIONAL  OFF)
 	set_and_warn(WITH_OPENVDB        OFF)
 	set_and_warn(WITH_OPENCOLORIO    OFF)
-	set_and_warn(WITH_MOD_BOOLEAN    OFF)
 
 	set_and_warn(WITH_OPENAL         OFF)  # depends on AUDASPACE
 	set_and_warn(WITH_GAMEENGINE     OFF)  # depends on AUDASPACE
 	set_and_warn(WITH_PLAYER         OFF)  # depends on GAMEENGINE
 elseif(WITH_CYCLES OR WITH_OPENIMAGEIO OR WITH_AUDASPACE OR WITH_INTERNATIONAL OR
-       WITH_OPENVDB OR WITH_OPENCOLORIO OR WITH_MOD_BOOLEAN)
+       WITH_OPENVDB OR WITH_OPENCOLORIO)
 	# Keep enabled
 else()
 	# New dependency graph needs either Boost or C++11 for function bindings.
@@ -1758,7 +1756,6 @@ if(FIRST_RUN)
 	endif()
 
 	info_cfg_text("Modifiers:")
-	info_cfg_option(WITH_MOD_BOOLEAN)
 	info_cfg_option(WITH_MOD_REMESH)
 	info_cfg_option(WITH_MOD_FLUID)
 	info_cfg_option(WITH_MOD_OCEANSIM)