Remove zebra-reactor.

This functionality will just go in zebrad and use abscissa, allowing
configs, component registries, etc.

Closes #59

Cargo.toml

@@ -7,6 +7,5 @@ members = [
         "zebra-consensus",
         "zebra-rpc",
         "zebra-client",
-        "zebra-reactor",
         "zebrad",
-]
+]

zebra-reactor/Cargo.toml

@@ -1,10 +0,0 @@
-[package]
-name = "zebra-reactor"
-license = "MIT OR Apache-2.0"
-version = "0.1.0"
-authors = ["Zcash Foundation <zebra@zfnd.org>"]
-edition = "2018"
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
-[dependencies]

zebra-reactor/src/lib.rs

@@ -1,7 +0,0 @@
-#[cfg(test)]
-mod tests {
-    #[test]
-    fn it_works() {
-        assert_eq!(2 + 2, 4);
-    }
-}