remove unnecessary stubs

If these are required across multiple spec files in the future, they
should be refactored into a single shared_context.

spec/libraries/pacemaker/constraint/colocation_spec.rb

@@ -12,10 +12,6 @@ describe Pacemaker::Constraint::Colocation do
     Chef::RSpec::Pacemaker::Config::COLOCATION_CONSTRAINT_DEFINITION
   }
 
-  before(:each) do
-    Mixlib::ShellOut.any_instance.stub(:run_command)
-  end
-
   def object_type
     'colocation'
   end

spec/libraries/pacemaker/constraint/location_spec.rb

@@ -12,10 +12,6 @@ describe Pacemaker::Constraint::Location do
     Chef::RSpec::Pacemaker::Config::LOCATION_CONSTRAINT_DEFINITION
   }
 
-  before(:each) do
-    Mixlib::ShellOut.any_instance.stub(:run_command)
-  end
-
   def object_type
     'location'
   end

spec/libraries/pacemaker/resource/clone_spec.rb

@@ -12,10 +12,6 @@ describe Pacemaker::Resource::Clone do
     Chef::RSpec::Pacemaker::Config::CLONE_RESOURCE_DEFINITION
   }
 
-  before(:each) do
-    Mixlib::ShellOut.any_instance.stub(:run_command)
-  end
-
   def object_type
     'clone'
   end

spec/libraries/pacemaker/resource/group_spec.rb

@@ -13,10 +13,6 @@ describe Pacemaker::Resource::Group do
     Chef::RSpec::Pacemaker::Config::RESOURCE_GROUP_DEFINITION
   }
 
-  before(:each) do
-    Mixlib::ShellOut.any_instance.stub(:run_command)
-  end
-
   def object_type
     'group'
   end

spec/libraries/pacemaker/resource/ms_spec.rb

@@ -12,10 +12,6 @@ describe Pacemaker::Resource::MasterSlave do
     Chef::RSpec::Pacemaker::Config::MS_RESOURCE_DEFINITION
   }
 
-  before(:each) do
-    Mixlib::ShellOut.any_instance.stub(:run_command)
-  end
-
   def object_type
     'ms'
   end