profiler: remove WithHostname

profiler/options.go

@@ -95,13 +95,6 @@ func WithURL(url string) Option {
 	}
 }
 
-// WithHostname allows specifying a custom hostname.
-func WithHostname(hostname string) Option {
-	return func(cfg *config) {
-		cfg.hostname = hostname
-	}
-}
-
 // WithPeriod specifies the interval at which to collect profiles.
 func WithPeriod(d time.Duration) Option {
 	return func(cfg *config) {

profiler/options_test.go

@@ -28,12 +28,6 @@ func TestOptions(t *testing.T) {
 		assert.Equal(t, "my-url", cfg.apiURL)
 	})
 
-	t.Run("WithHostname", func(t *testing.T) {
-		var cfg config
-		WithHostname("my-hostname")(&cfg)
-		assert.Equal(t, "my-hostname", cfg.hostname)
-	})
-
 	t.Run("WithPeriod", func(t *testing.T) {
 		var cfg config
 		WithPeriod(2 * time.Second)(&cfg)

profiler/profiler.go

@@ -28,8 +28,7 @@ var (
 var ErrMissingAPIKey = errors.New("API key is missing; provide it using the profiler.WithAPIKey option")
 
 // Start starts the profiler. It may return an error if an API key is not provided by means of
-// the WithAPIKey option, or if a hostname is not found. In the latter case, it may be provided
-// using the WithHostname option.
+// the WithAPIKey option, or if a hostname is not found.
 func Start(opts ...Option) error {
 	cfg := defaultConfig()
 	for _, opt := range opts {

profiler/profiler_test.go

@@ -47,14 +47,14 @@ func TestStart(t *testing.T) {
 	})
 
 	t.Run("options", func(t *testing.T) {
-		if err := Start(WithAPIKey("123"), WithHostname("my-host")); err != nil {
+		if err := Start(WithAPIKey("123")); err != nil {
 			t.Fatal(err)
 		}
 		defer Stop()
 
 		mu.Lock()
 		require.NotNil(t, activeProfiler)
-		assert.Equal(t, "my-host", activeProfiler.cfg.hostname)
+		assert.NotEmpty(t, activeProfiler.cfg.hostname)
 		mu.Unlock()
 	})
 }