Remove datacoord useless code (#7673)

Issue: #7624
Signed-off-by: Nsunby <bingyi.sun@zilliz.com>

internal/datacoord/meta_test.go

@@ -147,7 +147,6 @@ func TestMeta_Basic(t *testing.T) {
 	t.Run("Test GetCount", func(t *testing.T) {
 		const rowCount0 = 100
 		const rowCount1 = 300
-		const dim = 1024
 
 		// no segment
 		nums := meta.GetNumRowsOfCollection(collID)

internal/datacoord/segment_allocation_policy.go

@@ -79,8 +79,6 @@ func AllocatePolicyV1(segments []*SegmentInfo, count int64,
 	return newSegmentAllocations, existedSegmentAllocations
 }
 
-type sealPolicy func(maxCount, writtenCount, allocatedCount int64) bool
-
 // segmentSealPolicy seal policy applies to segment
 type segmentSealPolicy func(segment *SegmentInfo, ts Timestamp) bool
 

internal/datacoord/server.go

@@ -41,11 +41,7 @@ import (
 	"github.com/milvus-io/milvus/internal/proto/milvuspb"
 )
 
-const (
-	rootCoordClientTimout = 20 * time.Second
-	connEtcdMaxRetryTime  = 100000
-	connEtcdRetryInterval = 200 * time.Millisecond
-)
+const connEtcdMaxRetryTime = 100000
 
 var (
 	// TODO: sunby put to config
@@ -95,7 +91,6 @@ type Server struct {
 	allocator       allocator
 	cluster         *Cluster
 	rootCoordClient types.RootCoord
-	ddChannelName   string
 
 	metricsCacheManager *metricsinfo.MetricsCacheManager
 

internal/datacoord/server_test.go

@@ -61,7 +61,6 @@ func TestAssignSegmentID(t *testing.T) {
 	const collIDInvalid = 101
 	const partID = 0
 	const channel0 = "channel0"
-	const channel1 = "channel1"
 
 	t.Run("assign segment normally", func(t *testing.T) {
 		svr := newTestServer(t, nil)