chore(signer): simplify dependencies following shared aggregator client usage

Author: Alenar

Cargo.lock

@@ -9,6 +9,10 @@ homepage = { workspace = true }
 license = { workspace = true }
 repository = { workspace = true }
 
+[package.metadata.cargo-machete]
+# reqwest is needed to enable compression features since parent crates don't enables them
+ignored = ["reqwest"]
+
 [features]
 default = ["jemallocator"]
 
@@ -46,7 +50,6 @@ reqwest = { workspace = true, features = [
     "deflate",
     "brotli"
 ] }
-semver = { workspace = true }
 serde = { workspace = true }
 serde_json = { workspace = true }
 slog = { workspace = true, features = [
@@ -64,8 +67,6 @@ tikv-jemallocator = { version = "0.6.0", optional = true }
 
 [dev-dependencies]
 criterion = { version = "0.7.0", features = ["html_reports", "async_tokio"] }
-http = "1.3.1"
-httpmock = "0.8.1"
 mockall = { workspace = true }
 prometheus-parse = "0.2.5"
 slog-scope = "4.4.0"