client: fix unused imports

this was introduced in c950796596, but
likely due to the "replace" rules not being present, CI tested the
current version of the module instead of the code in the repository.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

client/container_commit_test.go

@@ -1,7 +1,6 @@
 package client
 
 import (
-	"context"
 	"fmt"
 	"net/http"
 	"testing"

client/image_prune_test.go

@@ -1,7 +1,6 @@
 package client
 
 import (
-	"context"
 	"net/http"
 	"testing"
 

client/network_connect_test.go

@@ -1,7 +1,6 @@
 package client
 
 import (
-	"context"
 	"encoding/json"
 	"fmt"
 	"net/http"

client/network_create_test.go

@@ -1,7 +1,6 @@
 package client
 
 import (
-	"context"
 	"net/http"
 	"testing"
 

client/network_disconnect_test.go

@@ -1,7 +1,6 @@
 package client
 
 import (
-	"context"
 	"encoding/json"
 	"fmt"
 	"net/http"

client/network_inspect_test.go

@@ -1,7 +1,6 @@
 package client
 
 import (
-	"context"
 	"net/http"
 	"strings"
 	"testing"

client/node_remove_test.go

@@ -1,7 +1,6 @@
 package client
 
 import (
-	"context"
 	"fmt"
 	"net/http"
 	"testing"

client/node_update_test.go

@@ -1,7 +1,6 @@
 package client
 
 import (
-	"context"
 	"net/http"
 	"testing"
 

client/plugin_push_test.go

@@ -1,7 +1,6 @@
 package client
 
 import (
-	"context"
 	"fmt"
 	"net/http"
 	"testing"

client/plugin_remove_test.go

@@ -1,7 +1,6 @@
 package client
 
 import (
-	"context"
 	"net/http"
 	"testing"
 

client/plugin_set_test.go

@@ -1,7 +1,6 @@
 package client
 
 import (
-	"context"
 	"net/http"
 	"testing"
 

client/secret_inspect_test.go

@@ -1,7 +1,6 @@
 package client
 
 import (
-	"context"
 	"errors"
 	"net/http"
 	"testing"

client/service_inspect_test.go

@@ -1,7 +1,6 @@
 package client
 
 import (
-	"context"
 	"errors"
 	"net/http"
 	"testing"

client/swarm_leave_test.go

@@ -1,7 +1,6 @@
 package client
 
 import (
-	"context"
 	"fmt"
 	"net/http"
 	"testing"

client/task_list_test.go

@@ -1,7 +1,6 @@
 package client
 
 import (
-	"context"
 	"fmt"
 	"net/http"
 	"testing"