Remove excluded path dependency

It doesn't work (see rust-lang/cargo#4089), so
wasn't giving us any benefits

Author: bjgill

tests/fixtures/workspace/Cargo.toml

@@ -4,5 +4,3 @@ members = [
     "two",
     "explicit/*"
 ]
-
-exclude = ["not_a_member"]

tests/fixtures/workspace/one/Cargo.toml

@@ -7,6 +7,5 @@ path = "../dummy.rs"
 
 [dependencies]
 libc = "0.2.28"
-three = { path = "../implicit/three"}
-bar = { git = "https://github.com/foo/bar.git", version = "0.10" }
-not_a_member = { path = "not_a_member", version = "0.10" }
+three = { path = "../implicit/three", version = "0.0.1"}
+lazy_static = { git = "https://github.com/rust-lang-nursery/lazy-static.rs.git", tag = "v0.2"}