Remove the unused QUIC port selection logic.

chrome/common/chrome_switches.h

Index: chrome/common/chrome_switches.h
diff --git a/chrome/common/chrome_switches.h b/chrome/common/chrome_switches.h
index 02e1b0f2d269015eddd1d253c3c07874703d8126..0241867a0f25c9e30aae9a472f5ed72682b67d16 100644
--- a/chrome/common/chrome_switches.h
+++ b/chrome/common/chrome_switches.h
@@ -96,7 +96,6 @@ extern const char kDisablePrintPreview[];
 extern const char kDisablePromptOnRepost[];
 extern const char kDisablePushApiBackgroundMode[];
 extern const char kDisableQuic[];
-extern const char kDisableQuicPortSelection[];
 extern const char kDisableSettingsWindow[];
 extern const char kDisableWebNotificationCustomLayouts[];
 extern const char kDisableWebUsbSecurity[];
@@ -136,7 +135,6 @@ extern const char kEnablePrintPreviewRegisterPromos[];
 extern const char kEnableProfiling[];
 extern const char kEnablePushApiBackgroundMode[];
 extern const char kEnableQuic[];
-extern const char kEnableQuicPortSelection[];
 extern const char kEnableSaveAsMenuLabelExperiment[];
 extern const char kEnableSettingsWindow[];
 extern const char kEnableSiteEngagementAppBanner[];