diff --git a/test/e2e/docker/Dockerfile b/test/e2e/docker/Dockerfile
index 6f0f337cf2..c81db55fc8 100644
--- a/test/e2e/docker/Dockerfile
+++ b/test/e2e/docker/Dockerfile
@@ -1,7 +1,7 @@
 # We need to build in a Linux environment to support C libraries, e.g. RocksDB.
 # We use Debian instead of Alpine, so that we can use binary database packages
 # instead of spending time compiling them.
-FROM golang:1.19
+FROM golang:1.20-bullseye
 
 RUN apt-get -qq update -y && apt-get -qq upgrade -y >/dev/null
 RUN apt-get -qq install -y libleveldb-dev librocksdb-dev >/dev/null
diff --git a/types/block.go b/types/block.go
index 0d9d167d3d..858969852f 100644
--- a/types/block.go
+++ b/types/block.go
@@ -1036,26 +1036,6 @@ func (data *Data) Hash() cmtbytes.HexBytes {
 	return data.hash
 }
 
-// BlobsByNamespace implements sort.Interface for Blob
-type BlobsByNamespace []Blob
-
-func (b BlobsByNamespace) Len() int {
-	return len(b)
-}
-
-func (b BlobsByNamespace) Swap(i, j int) {
-	b[i], b[j] = b[j], b[i]
-}
-
-func (b BlobsByNamespace) Less(i, j int) bool {
-	// The following comparison is `<` and not `<=` because bytes.Compare returns 0 for if a == b.
-	// We want this comparison to return `false` if a == b because:
-	// If both Less(i, j) and Less(j, i) are false,
-	// then the elements at index i and j are considered equal.
-	// See https://pkg.go.dev/sort#Interface
-	return bytes.Compare(b[i].NamespaceID, b[j].NamespaceID) < 0
-}
-
 type Blob struct {
 	// NamespaceVersion is the version of the namespace. Used in conjunction
 	// with NamespaceID to determine the namespace of this blob.
diff --git a/types/block_test.go b/types/block_test.go
index bd6c05f374..b20986137b 100644
--- a/types/block_test.go
+++ b/types/block_test.go
@@ -9,7 +9,6 @@ import (
 	"math"
 	"os"
 	"reflect"
-	"sort"
 	"testing"
 	"time"
 
@@ -857,55 +856,3 @@ func TestBlockIDEquals(t *testing.T) {
 	assert.True(t, blockIDEmpty.Equals(blockIDEmpty))
 	assert.False(t, blockIDEmpty.Equals(blockIDDifferent))
 }
-
-func TestBlobsByNamespaceIsSorted(t *testing.T) {
-	sortedBlobs := []Blob{
-		{
-			NamespaceID: []byte{1, 2, 3, 4, 5, 6, 7, 8},
-			Data:        stdbytes.Repeat([]byte{1}, 100),
-		},
-		{
-			NamespaceID: []byte{8, 7, 6, 5, 4, 3, 2, 1},
-			Data:        stdbytes.Repeat([]byte{2}, 100),
-		},
-	}
-	sameNamespacedBlobs := []Blob{
-		{
-			NamespaceID: []byte{1, 2, 3, 4, 5, 6, 7, 8},
-			Data:        stdbytes.Repeat([]byte{1}, 100),
-		},
-		{
-			NamespaceID: []byte{1, 2, 3, 4, 5, 6, 7, 8},
-			Data:        stdbytes.Repeat([]byte{2}, 100),
-		},
-	}
-	unsortedBlobs := []Blob{
-		{
-			NamespaceID: []byte{8, 7, 6, 5, 4, 3, 2, 1},
-			Data:        stdbytes.Repeat([]byte{1}, 100),
-		},
-		{
-			NamespaceID: []byte{1, 2, 3, 4, 5, 6, 7, 8},
-			Data:        stdbytes.Repeat([]byte{2}, 100),
-		},
-	}
-
-	type testCase struct {
-		description string
-		blobs       []Blob
-		want        bool
-	}
-
-	tests := []testCase{
-		{"sorted blobs", sortedBlobs, true},
-		{"same namespace blobs", sameNamespacedBlobs, true},
-		{"unsorted blobs", unsortedBlobs, false},
-	}
-
-	for _, tc := range tests {
-		t.Run(tc.description, func(t *testing.T) {
-			bs := tc.blobs
-			assert.Equal(t, tc.want, sort.IsSorted(BlobsByNamespace(bs)))
-		})
-	}
-}