submodules: Remove cc-runtime and runv

Both cc-runtime and runv git submodules can now be removed since
the new folder cli defines the OCI wrapper, and the kata API is
defined and implemented through the virtcontainers package in this
same repository.

Fixes #64

Signed-off-by: Sebastien Boeuf <[email protected]>

Author: Sebastien Boeuf

.gitmodules

@@ -1,6 +0,0 @@
-[submodule "cc-runtime"]
-	path = cc-runtime
-	url = https://github.com/clearcontainers/runtime
-[submodule "runv"]
-	path = runv
-	url = https://github.com/hyperhq/runv.git