Deprecate the unused spans feature (rustwasm#4341)

Author: RunDevelopment

Cargo.toml

@@ -22,10 +22,10 @@ features = ["serde-serialize"]
 test = false
 
 [features]
-default = ["spans", "std"]
+default = ["std"]
 enable-interning = ["std"]
 serde-serialize = ["serde", "serde_json", "std"]
-spans = ["wasm-bindgen-macro/spans"]
+spans = []
 std = ["wasm-bindgen-macro/std", "once_cell/std"]
 
 # Whether or not the `#[wasm_bindgen]` macro is strict and generates an error on

crates/backend/Cargo.toml

@@ -16,7 +16,6 @@ version = "0.2.99"
 [features]
 default = ["std"]
 extra-traits = ["syn/extra-traits"]
-spans = []
 std = []
 
 [dependencies]

crates/macro-support/Cargo.toml

@@ -16,7 +16,6 @@ version = "0.2.99"
 [features]
 default = ["std"]
 extra-traits = ["syn/extra-traits"]
-spans = ["wasm-bindgen-backend/spans"]
 std = ["wasm-bindgen-backend/std"]
 strict-macro = []
 

crates/macro/Cargo.toml

@@ -18,7 +18,6 @@ proc-macro = true
 
 [features]
 default = ["std"]
-spans = ["wasm-bindgen-macro-support/spans"]
 std = ["wasm-bindgen-macro-support/std"]
 strict-macro = ["wasm-bindgen-macro-support/strict-macro"]
 xxx_debug_only_print_generated_code = []