Cut unused AsyncSocketException::SASL_HANDSHAKE_TIMEOUT

Summary: [Folly] Cut unused `AsyncSocketException::SASL_HANDSHAKE_TIMEOUT`.

Reviewed By: vitaut

Differential Revision: D19343864

fbshipit-source-id: ed4374bc2b376ff71e592323ed8c37290700e870

folly/io/async/AsyncSocketException.cpp

@@ -50,8 +50,6 @@ namespace folly {
       return "SSL error";
     case COULD_NOT_BIND:
       return "Could not bind";
-    case SASL_HANDSHAKE_TIMEOUT:
-      return "SASL handshake timeout";
     case NETWORK_ERROR:
       return "Network error";
     case EARLY_DATA_REJECTED:

folly/io/async/AsyncSocketException.h

@@ -40,7 +40,7 @@ class FOLLY_EXPORT AsyncSocketException : public std::runtime_error {
     INVALID_STATE = 10,
     SSL_ERROR = 12,
     COULD_NOT_BIND = 13,
-    SASL_HANDSHAKE_TIMEOUT = 14,
+    // SASL_HANDSHAKE_TIMEOUT = 14, // no longer used
     NETWORK_ERROR = 15,
     EARLY_DATA_REJECTED = 16,
   };