Region: remove the Serialization requirement

Cargo.lock

@@ -339,7 +339,6 @@ dependencies = [
  "spirv_backend",
  "spirv_backend_runner",
  "threadpool",
- "typetag",
  "wgpu",
  "y4m",
 ]
@@ -502,16 +501,6 @@ dependencies = [
  "memchr",
 ]
 
-[[package]]
-name = "ctor"
-version = "0.1.22"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f877be4f7c9f246b183111634f75baa039715e3f46ce860677d3b19a69fb229c"
-dependencies = [
- "quote",
- "syn",
-]
-
 [[package]]
 name = "cty"
 version = "0.2.2"
@@ -590,15 +579,6 @@ dependencies = [
  "termcolor",
 ]
 
-[[package]]
-name = "erased-serde"
-version = "0.3.21"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "81d013529d5574a60caeda29e179e695125448e5de52e3874f7b4c1d7360e18e"
-dependencies = [
- "serde",
-]
-
 [[package]]
 name = "exr"
 version = "1.4.2"
@@ -802,17 +782,6 @@ dependencies = [
  "wasm-bindgen",
 ]
 
-[[package]]
-name = "ghost"
-version = "0.1.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b93490550b1782c589a350f2211fff2e34682e25fed17ef53fc4fa8fe184975e"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
-
 [[package]]
 name = "gif"
 version = "0.11.4"
@@ -1021,16 +990,6 @@ dependencies = [
  "web-sys",
 ]
 
-[[package]]
-name = "inventory"
-version = "0.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e0257e268c91daba296499206db5dd5a058875936bec3d8429b5f3e20ec9dc9a"
-dependencies = [
- "ctor",
- "ghost",
-]
-
 [[package]]
 name = "itertools"
 version = "0.10.3"
@@ -2236,30 +2195,6 @@ version = "1.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dcf81ac59edc17cc8697ff311e8f5ef2d99fcbd9817b34cec66f90b6c3dfd987"
 
-[[package]]
-name = "typetag"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "36afde536989c95b0c35d2b6720618ed268b271a002fa1ebd97e821cf9ff28c6"
-dependencies = [
- "erased-serde",
- "inventory",
- "once_cell",
- "serde",
- "typetag-impl",
-]
-
-[[package]]
-name = "typetag-impl"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2c935ee7eb11a684e863c6a3332ff17caa2a46fc855719a90c6493aee213852b"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
-
 [[package]]
 name = "unicode-ident"
 version = "1.0.1"