avoid publishing template_distribution_sv2 with all-features..

publishing with all-features is overengineering:
- no_std is being deprecated via stratum-mining#1315
- with_serde will be deprecated soon
- no point in publishing docs for code under prop_test

protocols/v2/subprotocols/template-distribution/Cargo.toml

@@ -24,6 +24,3 @@ quickcheck_macros = { version = "1", optional=true }
 no_std = []
 with_serde = ["binary_sv2/with_serde", "serde"]
 prop_test = ["quickcheck"]
-
-[package.metadata.docs.rs]
-all-features = true