Remove no longer required dependencies

With the update to rand 0.6.4 we no longer require the dependencies to
rustc_version, semver, and semver-parser. Hence, this change removes
them.

Delete subrepo rustc_version/:rustc_version
Delete subrepo semver/:semver
Delete subrepo semver-parser/:semver-parser

1 files changed, 0 insertions, 3 deletions

diff --git a/semver/.gitignore b/semver/.gitignore
deleted file mode 100644
index cc3b589..0000000
--- a/semver/.gitignore
+++ /dev/null
@@ -1,3 +0,0 @@
-target/
-*.sw?
-Cargo.lock