fix(helm): fix the build-time golint warning on 'cmd/helm/install.go'

When building helm, golint no longer generates the following warning:

cmd/helm/install.go:502:9⚠️ if block ends with a return statement, so drop this else and outdent its block (golint)

Signed-off-by: Arash Deshmeh <adeshmeh@ca.ibm.com>

cmd/helm/install.go

@@ -499,12 +499,12 @@ func readFile(filePath string) ([]byte, error) {
 
 	if err != nil {
 		return ioutil.ReadFile(filePath)
-	} else {
+	}
+
 	getter, err := getterConstructor(filePath, "", "", "")
 	if err != nil {
 		return []byte{}, err
 	}
 	data, err := getter.Get(filePath)
 	return data.Bytes(), err
-	}
 }