manifest-schema: Remove unused anyhow dependency

tools/manifest-schema/Cargo.toml

@@ -4,8 +4,8 @@ version = "0.1.0"
 edition = "2021"
 license = "MIT OR Apache-2.0"
 
+# Note: semver and serde are public dependencies.
 [dependencies]
-anyhow = "1"
 semver = { version = "1", features = ["serde"] }
 serde = "1"
 serde_derive = "1"

tools/manifest-schema/src/lib.rs

@@ -11,7 +11,6 @@ use std::{
     str::FromStr,
 };
 
-use anyhow::Result;
 use serde::{
     de::{self, Deserialize, Deserializer},
     ser::{Serialize, Serializer},