Remove unused dependencies from macros crate

Author: djc

Cargo.lock

@@ -10,6 +10,4 @@ proc-macro = true
 [dependencies]
 proc-macro2 = "1.0.63"
 quote = "1.0.23"
-regex = "1.10.0"
-sha2 = "0.10.6"
 syn = { version = "2.0.13", features = ["full"] }