mem-ruby: Remove unused variables/mark [maybe unused] (#1650)

PR gem5#1453 left some unused variables in the ruby code that triggered
"unused variable" warnings found comiling ALL/gem5.opt to use the CHI
protocol. These have been removed.

src/mem/ruby/slicc_interface/Message.hh

@@ -66,8 +66,7 @@ class Message
         : m_block_size(block_size),
           m_time(curTime),
           m_LastEnqueueTime(curTime),
-          m_DelayedTicks(0), m_msg_counter(0),
-          p_ruby_system(rs)
+          m_DelayedTicks(0), m_msg_counter(0)
     { }
 
     Message(const Message &other) = default;
@@ -135,9 +134,6 @@ class Message
     // Variables for required network traversal
     int incoming_link;
     int vnet;
-
-    // Needed to call MacheinType_base_count/level
-    const RubySystem *p_ruby_system = nullptr;
 };
 
 inline bool

src/mem/ruby/structures/BankedArray.hh

@@ -51,7 +51,6 @@ class BankedArray
     Tick clockPeriod = 0;
     unsigned int bankBits;
     unsigned int startIndexBit;
-    RubySystem *m_ruby_system;
 
     class AccessRecord
     {