migration: remove return after g_assert_not_reached()

This patch is part of a series that moves towards a consistent use of
g_assert_not_reached() rather than an ad hoc mix of different
assertion mechanisms.

Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20240919044641.386068-31-pierrick.bouvier@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>

migration/dirtyrate.c

@@ -229,7 +229,6 @@ static int time_unit_to_power(TimeUnit time_unit)
         return -3;
     default:
         g_assert_not_reached();
-        return 0;
     }
 }
 

migration/postcopy-ram.c

@@ -1412,40 +1412,34 @@ int postcopy_ram_incoming_init(MigrationIncomingState *mis)
 int postcopy_ram_incoming_cleanup(MigrationIncomingState *mis)
 {
     g_assert_not_reached();
-    return -1;
 }
 
 int postcopy_ram_prepare_discard(MigrationIncomingState *mis)
 {
     g_assert_not_reached();
-    return -1;
 }
 
 int postcopy_request_shared_page(struct PostCopyFD *pcfd, RAMBlock *rb,
                                  uint64_t client_addr, uint64_t rb_offset)
 {
     g_assert_not_reached();
-    return -1;
 }
 
 int postcopy_ram_incoming_setup(MigrationIncomingState *mis)
 {
     g_assert_not_reached();
-    return -1;
 }
 
 int postcopy_place_page(MigrationIncomingState *mis, void *host, void *from,
                         RAMBlock *rb)
 {
     g_assert_not_reached();
-    return -1;
 }
 
 int postcopy_place_page_zero(MigrationIncomingState *mis, void *host,
                         RAMBlock *rb)
 {
     g_assert_not_reached();
-    return -1;
 }
 
 int postcopy_wake_shared(struct PostCopyFD *pcfd,
@@ -1453,7 +1447,6 @@ int postcopy_wake_shared(struct PostCopyFD *pcfd,
                          RAMBlock *rb)
 {
     g_assert_not_reached();
-    return -1;
 }
 #endif
 

migration/ram.c

@@ -1766,13 +1766,11 @@ bool ram_write_tracking_available(void)
 bool ram_write_tracking_compatible(void)
 {
     g_assert_not_reached();
-    return false;
 }
 
 int ram_write_tracking_start(void)
 {
     g_assert_not_reached();
-    return -1;
 }
 
 void ram_write_tracking_stop(void)