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/arch/arm/fastmodel/iris/thread_context.hh

@@ -191,16 +191,6 @@ class ThreadContext : public ::ThreadContext
     int contextId() const override { return _contextId; }
     void setContextId(int id) override { _contextId = id; }
 
-    BaseTLB *
-    getITBPtr() override
-    {
-        return _itb;
-    }
-    BaseTLB *
-    getDTBPtr() override
-    {
-        return _dtb;
-    }
     BaseMMU *
     getMMUPtr() override
     {