mem-ruby: HTMSequencer stats initialized twice

HTMSequencer stats are already initialized in the constructor

This is a bug from:

[1]: https://gem5-review.googlesource.com/c/public/gem5/+/36478

Change-Id: Id7d9b11f45035a46af32584ed86470c65d2a80b6
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/51407
Reviewed-by: Hoa Nguyen <hoanguyen@ucdavis.edu>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

src/mem/ruby/system/HTMSequencer.cc

@@ -209,40 +209,6 @@ HTMSequencer::htmCallback(Addr address,
     }
 }
 
-void
-HTMSequencer::regStats()
-{
-    // hardware transactional memory
-    m_htm_transaction_cycles
-        .init(10)
-        .name(name() + ".htm_transaction_cycles")
-        .desc("number of cycles spent in an outer transaction")
-        .flags(statistics::pdf | statistics::dist | statistics::nozero |
-            statistics::nonan)
-        ;
-    m_htm_transaction_instructions
-        .init(10)
-        .name(name() + ".htm_transaction_instructions")
-        .desc("number of instructions spent in an outer transaction")
-        .flags(statistics::pdf | statistics::dist | statistics::nozero |
-            statistics::nonan)
-        ;
-    auto num_causes = static_cast<int>(HtmFailureFaultCause::NUM_CAUSES);
-    m_htm_transaction_abort_cause
-        .init(num_causes)
-        .name(name() + ".htm_transaction_abort_cause")
-        .desc("cause of htm transaction abort")
-        .flags(statistics::total | statistics::pdf | statistics::dist |
-            statistics::nozero)
-        ;
-
-    for (unsigned cause_idx = 0; cause_idx < num_causes; ++cause_idx) {
-        m_htm_transaction_abort_cause.subname(
-            cause_idx,
-            htmFailureToStr(HtmFailureFaultCause(cause_idx)));
-    }
-}
-
 void
 HTMSequencer::rubyHtmCallback(PacketPtr pkt,
                           const HtmFailedInCacheReason htm_return_code)

src/mem/ruby/system/HTMSequencer.hh

@@ -68,7 +68,6 @@ class HTMSequencer : public Sequencer
 
     bool empty() const override;
     void print(std::ostream& out) const override;
-    void regStats() override;
     void wakeup() override;
 
   private: