pc_q35: remove unnecessary m->alias assignment

The assignment is already inherited from pc-q35-8.2.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index b5922b4..c7bc8a2 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -393,7 +393,6 @@
 {
     PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
     pc_q35_8_2_machine_options(m);
-    m->alias = NULL;
     pcmc->broken_32bit_mem_addr_check = true;
     compat_props_add(m->compat_props, hw_compat_8_1, hw_compat_8_1_len);
     compat_props_add(m->compat_props, pc_compat_8_1, pc_compat_8_1_len);