fix warnings

Cargo.toml

@@ -17,7 +17,7 @@ members = [
 
 [workspace.dependencies]
 # common
-serde = { version = "1.0.164", features = ["derive"] }
+serde = { version = "1.0.164", default-features = false, features = ["derive"] }
 thiserror = "1.0.40"
 anyhow = "1.0.71"
 rand = "0.8.5"
@@ -26,7 +26,7 @@ serde_json = "1.0.99"
 serde_tuple = "0.5.0"
 byteorder = "1.4.3"
 hex = "0.4.3"
-num-traits = "0.2.14"
+num-traits = { version = "0.2.14", default-features = false }
 num-derive = "0.4.0"
 lazy_static = "1.4.0"
 log = "0.4.19"
@@ -58,7 +58,8 @@ quickcheck_macros = "1.0.0"
 minstant = "0.1.3"
 
 # workspace
-fvm = { path = "fvm" }
+fvm = { path = "fvm", default-features = false }
+fvm_shared = { path = "shared",  default-features = false }
 fvm_sdk = { path = "sdk" }
 fvm_ipld_amt = { path = "ipld/amt" }
 fvm_ipld_hamt = { path = "ipld/hamt" }
@@ -67,7 +68,6 @@ fvm_ipld_car = { path = "ipld/car" }
 fvm_ipld_blockstore = { path = "ipld/blockstore" }
 fvm_ipld_bitfield = { path = "ipld/bitfield" }
 fvm_ipld_encoding = { path = "ipld/encoding" }
-fvm_shared = { path = "shared" }
 
 [profile.actor]
 inherits = "release"