prune unnecessary features (#171)

Author: miguelraz

exercise-solutions/async-chat/Cargo.toml

@@ -4,4 +4,4 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
-tokio = { version = "1", features = ["full"] }
+tokio = { version = "1", features = ["io-std", "io-util", "macros", "net", "rt-multi-thread", "signal", "sync"] }

exercise-solutions/shapes-part-3/Cargo.toml

@@ -5,4 +5,4 @@ name = "shapes-part-3"
 version = "0.1.0"
 
 [dependencies]
-num = "0.4.0"
+num = { version = "0.4.0", default-features = false }

exercise-solutions/urls-match-result/Cargo.toml

@@ -5,4 +5,4 @@ name = "urls_match_result"
 version = "0.1.0"
 
 [dependencies]
-url = "2"
+url = { version = "2", default-features = false }