cpu, fastmodel: Remove the old getDTBPtr/getITBPtr virtual methods

JIRA: https://gem5.atlassian.net/browse/GEM5-790

Change-Id: I6c6cdeaa3ae1433624e4e5b30b031d49e822f0e0
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/34984
Maintainer: Gabe Black <gabe.black@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Anthony Gutierrez <anthony.gutierrez@amd.com>

src/cpu/simple_thread.hh

@@ -206,10 +206,6 @@ class SimpleThread : public ThreadState, public ThreadContext
     ContextID contextId() const override { return ThreadState::contextId(); }
     void setContextId(ContextID id) override { ThreadState::setContextId(id); }
 
-    BaseTLB *getITBPtr() override { return mmu->itb; }
-
-    BaseTLB *getDTBPtr() override { return mmu->dtb; }
-
     BaseMMU *getMMUPtr() override { return mmu; }
 
     CheckerCPU *getCheckerCpuPtr() override { return NULL; }