Remove SyncDebug from VimBroker

This is a tool for debugging concurrency issues that is left commented
out and never used, but depends on a tool in manageiq-gems-pending that
we are looking to remove.

Closes ManageIQ#54

lib/VMwareWebService/MiqVimBroker.rb

@@ -73,10 +73,6 @@ def new_with(uri, ref)
       require 'timeout'
       require 'VMwareWebService/broker_timeout'
 
-      # Un-comment following 2 lines to enable Sync lock debugging.
-      # require 'broker_sync_debug'
-      # extend BrokerSyncDebug
-
       unless @@classModed
         DRb.instance_variable_set(:@mutex, sync_for_drb)
         DRb::DRbConn.instance_variable_set(:@mutex, sync_for_drb_drbconn)
@@ -107,27 +103,22 @@ def new_with(uri, ref)
     end
   end
 
-  # Can be overridden by BrokerSyncDebug.
   def connection_lock
     Sync.new
   end
 
-  # Can be overridden by BrokerSyncDebug.
   def config_lock
     Sync.new
   end
 
-  # Can be overridden by BrokerSyncDebug.
   def sync_for_lock_hash(_key)
     Sync.new
   end
 
-  # Can be overridden by BrokerSyncDebug.
   def sync_for_drb_drbconn
     Sync.new
   end
 
-  # Can be overridden by BrokerSyncDebug.
   def sync_for_drb
     Sync.new
   end

lib/VMwareWebService/MiqVimInventory.rb

@@ -1,4 +1,3 @@
-require 'VMwareWebService/VimSyncDebug'
 require 'sync'
 require 'enumerator'
 require 'VMwareWebService/MiqVimClientBase'
@@ -94,9 +93,6 @@ def initialize(server, username, password, cacheScope = nil)
     @cacheLock  = Sync.new
     @configLock = Sync.new
 
-    # Un-comment to enable Sync lock debugging.
-    # extend VimSyncDebug
-
     resetCache
     __connect
     @alive = true