diff --git a/pkg/release/release.go b/pkg/release/release.go
index 3a1804b..dca7c3d 100644
--- a/pkg/release/release.go
+++ b/pkg/release/release.go
@@ -52,18 +52,8 @@ func ProcessNewReleases(options *util.Options) {
 }
 
 func createNewReleases(newTags map[string]*semver.Version) error {
-	mapping, err := util.LoadUpstreamSources()
-	if err != nil {
-		log.Fatal("err during loading upstream sources: " + err.Error())
-	}
-
 	for _, tag := range newTags {
-		tektonTaskBranch, err := util.GetTektonTasksBranch(mapping, fmt.Sprintf("%v.%v", tag.Major(), tag.Minor()))
-		if err != nil {
-			return err
-		}
-
-		err = generateManifests(tag.Original(), tektonTaskBranch)
+		err := generateManifests(tag.Original())
 		if err != nil {
 			log.Fatal("err during generation of manifests: " + err.Error())
 		}
@@ -76,9 +66,8 @@ func createNewReleases(newTags map[string]*semver.Version) error {
 	return nil
 }
 
-func generateManifests(tag, branch string) error {
+func generateManifests(tag string) error {
 	os.Setenv("RELEASE_VERSION", tag)
-	os.Setenv("RELEASE_BRANCH", branch)
 	cmd := exec.Command("bash", "-c", "./generate-manifests.sh")
 	cmd.Stdout = os.Stdout
 	cmd.Stderr = os.Stdout
diff --git a/pkg/util/util.go b/pkg/util/util.go
index e6cb5a8..28a79db 100644
--- a/pkg/util/util.go
+++ b/pkg/util/util.go
@@ -1,12 +1,5 @@
 package util
 
-import (
-	"bufio"
-	"fmt"
-	"os"
-	"strings"
-)
-
 type Options struct {
 	DryRun         bool
 	ExistingTags   string
@@ -15,26 +8,3 @@ type Options struct {
 	Username       string
 	GitToken       string
 }
-
-func LoadUpstreamSources() (map[string]string, error) {
-	file, err := os.Open("upstream_sources.yaml")
-	if err != nil {
-		return nil, err
-	}
-	fscanner := bufio.NewScanner(file)
-	upstreamSourcesMapping := make(map[string]string)
-	for fscanner.Scan() {
-		line := strings.Split(fscanner.Text(), ":")
-		upstreamSourcesMapping[line[0]] = line[1]
-	}
-	return upstreamSourcesMapping, nil
-}
-
-func GetTektonTasksBranch(upstreamSources map[string]string, version string) (string, error) {
-	var branch string
-	var ok bool
-	if branch, ok = upstreamSources[version]; !ok {
-		return "", fmt.Errorf("There is missing mapping between branch of kubevirt-tekton-tasks and OCP V version " + version)
-	}
-	return branch, nil
-}
diff --git a/upstream_sources.yaml b/upstream_sources.yaml
deleted file mode 100644
index 8202661..0000000
--- a/upstream_sources.yaml
+++ /dev/null
@@ -1,2 +0,0 @@
-4.15:main
-4.16:main