Replace actors cids to builtin.types in mockruntime (filecoin-project#629)

Co-authored-by: lyswifter <[email protected]>

Author: lyswifter

actors/power/src/lib.rs

@@ -10,7 +10,7 @@ use fil_actors_runtime::runtime::builtins::Type;
 use fil_actors_runtime::runtime::{ActorCode, Runtime};
 use fil_actors_runtime::{
     actor_error, cbor, make_map_with_root_and_bitwidth, ActorDowncast, ActorError, Multimap,
-    CALLER_TYPES_SIGNABLE, CRON_ACTOR_ADDR, INIT_ACTOR_ADDR, REWARD_ACTOR_ADDR, SYSTEM_ACTOR_ADDR,
+    CRON_ACTOR_ADDR, INIT_ACTOR_ADDR, REWARD_ACTOR_ADDR, SYSTEM_ACTOR_ADDR,
 };
 use fvm_ipld_blockstore::Blockstore;
 use fvm_ipld_encoding::RawBytes;