Move /x/context to context in examples

examples/basic/advertiser/main.go

 package main
 
 import (
+	"context"
 	"flag"
 	"fmt"
 	"log"
 	"time"
 
 	"github.com/pkg/errors"
-	"golang.org/x/net/context"
 
 	"github.com/currantlabs/ble"
 	"github.com/currantlabs/ble/examples/lib/dev"

examples/basic/explorer/main.go

 package main
 
 import (
+	"context"
 	"flag"
 	"fmt"
 	"log"
@@ -8,7 +9,6 @@ import (
 	"time"
 
 	"github.com/pkg/errors"
-	"golang.org/x/net/context"
 
 	"github.com/currantlabs/ble"
 	"github.com/currantlabs/ble/examples/lib/dev"

examples/basic/scanner/main.go

 package main
 
 import (
+	"context"
 	"flag"
 	"fmt"
 	"log"
 	"time"
 
 	"github.com/pkg/errors"
-	"golang.org/x/net/context"
 
 	"github.com/currantlabs/ble"
 	"github.com/currantlabs/ble/examples/lib/dev"

examples/basic/server/main.go

 package main
 
 import (
+	"context"
 	"flag"
 	"fmt"
 	"log"
 	"time"
 
 	"github.com/pkg/errors"
-	"golang.org/x/net/context"
 
 	"github.com/currantlabs/ble"
 	"github.com/currantlabs/ble/examples/lib"

examples/blesh/main.go

@@ -2,14 +2,13 @@ package main
 
 import (
 	"bufio"
+	"context"
 	"fmt"
 	"os"
 	"os/signal"
 	"strings"
 	"syscall"
 
-	"golang.org/x/net/context"
-
 	"github.com/pkg/errors"
 	"github.com/urfave/cli"
 

examples/blesh/util.go

 package main
 
 import (
+	"context"
 	"fmt"
 
 	"github.com/currantlabs/ble"
 	"github.com/pkg/errors"
 	"github.com/urfave/cli"
-	"golang.org/x/net/context"
 )
 
 func doGetUUID(c *cli.Context) error {