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/s390x/cpu.c

@@ -233,7 +233,6 @@ static void s390_cpu_class_init(struct uc_struct *uc, CPUClass *oc)
     cc->debug_excp_handler = s390x_cpu_debug_excp_handler;
     cc->do_unaligned_access = s390x_cpu_do_unaligned_access;
     cc->tcg_initialize = s390x_translate_init;
-    cc->tlb_fill = s390_cpu_tlb_fill;
     cc->tlb_fill_cpu = s390_cpu_tlb_fill;
 
     // s390_cpu_model_class_register_props(oc);