Remove MMU hacks

Unicorn has included some ugly hacks to provide a envirement where vaddr == paddr.
These hacks where to use the full 64 bit mappings on x86 without init the mmu
and some memory redirect for MIPS.

The UC_TLB_CPU mode defaults to vaddr == paddr, therfor these hacks aren't
required anymore.

qemu/target/i386/cpu.c

@@ -5066,7 +5066,6 @@ static void x86_cpu_common_class_init(struct uc_struct *uc, CPUClass *oc, void *
     cc->cpu_exec_enter = x86_cpu_exec_enter;
     cc->cpu_exec_exit = x86_cpu_exec_exit;
     cc->tcg_initialize = tcg_x86_init;
-    cc->tlb_fill = x86_cpu_tlb_fill;
     cc->tlb_fill_cpu = x86_cpu_tlb_fill;
 }