Remove unused YAML tags and GetYAML/SetYAML methods

Unneeded after move to ghodss/yaml.

pkg/version/version.go

@@ -20,11 +20,11 @@ package version
 // TODO: Add []string of api versions supported? It's still unclear
 // how we'll want to distribute that information.
 type Info struct {
-	Major        string `json:"major" yaml:"major"`
-	Minor        string `json:"minor" yaml:"minor"`
-	GitVersion   string `json:"gitVersion" yaml:"gitVersion"`
-	GitCommit    string `json:"gitCommit" yaml:"gitCommit"`
-	GitTreeState string `json:"gitTreeState" yaml:"gitTreeState"`
+	Major        string `json:"major"`
+	Minor        string `json:"minor"`
+	GitVersion   string `json:"gitVersion"`
+	GitCommit    string `json:"gitCommit"`
+	GitTreeState string `json:"gitTreeState"`
 }
 
 // Get returns the overall codebase version. It's for detecting