Revert "Dependency updates. (#14033)" (#14304)

This reverts commit f14c79f170.

vendor/github.com/mitchellh/go-testing-interface/README.md

@@ -38,14 +38,6 @@ You can also call the test helper at runtime if needed:
         TestHelper(&testing.RuntimeT{})
     }
 
-## Versioning
-
-The tagged version matches the version of Go that the interface is
-compatible with. For example, the version "1.14.0" is for Go 1.14 and
-introduced the `Cleanup` function. The patch version (the ".0" in the
-prior example) is used to fix any bugs found in this library and has no
-correlation to the supported Go version.
-
 ## Why?!
 
 **Why would I call a test helper that takes a *testing.T at runtime?**