Improve stacktraces by not wrapping CDS exceptions in RuntimeExceptions.

libsignal-service/src/main/java/org/whispersystems/signalservice/api/cds/CdsApi.kt

@@ -72,8 +72,6 @@ class CdsApi(private val authWebSocket: SignalWebSocket.AuthenticatedWebSocket)
             is TimeoutException -> NetworkResult.NetworkError(IOException("Timed out"))
             else -> throw e
           }
-        } catch (e: Exception) {
-          throw RuntimeException("Unexpected exception when retrieving registered users!", e)
         }
       }
   }