Clean up blank lines in container_manager_test.go

Removed unnecessary blank lines in the test file.

pkg/kubelet/cm/container_manager_test.go

@@ -20,7 +20,7 @@ package cm
 
 import (
 	"testing"
-	
+
 	"github.com/stretchr/testify/require"
 )
 
@@ -75,7 +75,7 @@ func TestParsePercentage(t *testing.T) {
 			expectErr: true,
 		},
 	}
-	
+
 	for _, testCase := range testCases {
 		t.Run(testCase.name, func(t *testing.T) {
 			result, err := parsePercentage(testCase.input)