Remove some unnecessary dependencies across phases

bootstrapvz/common/tasks/bootstrap.py

@@ -80,7 +80,6 @@ class Bootstrap(Task):
 class IncludePackagesInBootstrap(Task):
 	description = 'Add packages in the bootstrap phase'
 	phase = phases.preparation
-	successors = [Bootstrap]
 
 	@classmethod
 	def run(cls, info):
@@ -92,7 +91,6 @@ class IncludePackagesInBootstrap(Task):
 class ExcludePackagesInBootstrap(Task):
 	description = 'Remove packages from bootstrap phase'
 	phase = phases.preparation
-	successors = [Bootstrap]
 
 	@classmethod
 	def run(cls, info):

bootstrapvz/plugins/google_cloud_sdk/tasks.py

@@ -1,6 +1,5 @@
 from bootstrapvz.base import Task
 from bootstrapvz.common import phases
-from bootstrapvz.common.tasks import workspace
 from bootstrapvz.common.tools import log_check_call
 import os
 
@@ -66,7 +65,6 @@ class InstallCloudSDK(Task):
 class RemoveCloudSDKTarball(Task):
 	description = 'Remove tarball for Cloud SDK'
 	phase = phases.system_cleaning
-	successors = [workspace.DeleteWorkspace]
 
 	@classmethod
 	def run(cls, info):

bootstrapvz/plugins/pip_install/tasks.py

@@ -1,7 +1,5 @@
 from bootstrapvz.base import Task
 from bootstrapvz.common import phases
-from bootstrapvz.common.tasks import network
-from bootstrapvz.common.tasks import packages
 from bootstrapvz.common.tasks import apt
 
 
@@ -9,7 +7,6 @@ class AddPipPackage(Task):
 	description = 'Adding `pip\' and Co. to the image packages'
 	phase = phases.preparation
 	predecessors = [apt.AddDefaultSources]
-	successors = [packages.InstallPackages]
 
 	@classmethod
 	def run(cls, info):
@@ -20,7 +17,6 @@ class AddPipPackage(Task):
 class PipInstallCommand(Task):
 	description = 'Install python packages from pypi with pip'
 	phase = phases.system_modification
-	successors = [network.RemoveDNSInfo]
 
 	@classmethod
 	def run(cls, info):