cpu,fastmodel: Eliminate the now unnecessary initMemProxies method.

The proxies this method initializes no longer exist, since they're now
created locally.

Change-Id: I5fd1c99fbc00f5057ea8868e91be02d577b1c176
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/45909
Reviewed-by: Gabe Black <gabe.black@gmail.com>
Maintainer: Gabe Black <gabe.black@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

src/cpu/o3/cpu.cc

@@ -564,8 +564,6 @@ CPU::init()
         // Set noSquashFromTC so that the CPU doesn't squash when initially
         // setting up registers.
         thread[tid]->noSquashFromTC = true;
-        // Initialise the ThreadContext's memory proxies
-        thread[tid]->initMemProxies(thread[tid]->getTC());
     }
 
     // Clear noSquashFromTC.

src/cpu/o3/thread_context.hh

@@ -143,12 +143,6 @@ class ThreadContext : public gem5::ThreadContext
 
     void setProcessPtr(Process *p) override { thread->setProcessPtr(p); }
 
-    void
-    initMemProxies(gem5::ThreadContext *tc) override
-    {
-        thread->initMemProxies(tc);
-    }
-
     /** Returns this thread's status. */
     Status status() const override { return thread->status(); }