Don't hold lock on error

lib/kamal/commander.rb

@@ -2,13 +2,12 @@ require "active_support/core_ext/enumerable"
 require "active_support/core_ext/module/delegation"
 
 class Kamal::Commander
-  attr_accessor :verbosity, :holding_lock, :hold_lock_on_error
+  attr_accessor :verbosity, :holding_lock
   delegate :hosts, :roles, :primary_host, :primary_role, :roles_on, :traefik_hosts, :accessory_hosts, to: :specifics
 
   def initialize
     self.verbosity = :info
     self.holding_lock = false
-    self.hold_lock_on_error = false
     @specifics = nil
   end
 
@@ -138,10 +137,6 @@ class Kamal::Commander
     self.holding_lock
   end
 
-  def hold_lock_on_error?
-    self.hold_lock_on_error
-  end
-
   private
     # Lazy setup of SSHKit
     def configure_sshkit_with(config)