Drop redundant error handling and logging

The generic "connection failed" catch handler is redundant with the one on the `result`
deferred. The same is the case for the logging in the "connection timeout" catch handler.

Author: DerGuteMoritz

src/aleph/http.clj

@@ -397,15 +397,8 @@
                                         ;; connection timeout triggered
                                         (d/catch' TimeoutException
                                                   (fn [^Throwable e]
-                                                    (log/error e "Timed out waiting for connection to be established")
                                                     (d/error-deferred (ConnectionTimeoutException. e))))
 
-                                        ;; connection failed, bail out
-                                        (d/catch'
-                                         (fn [e]
-                                           (log/error e "Connection failure")
-                                           (d/error-deferred e)))
-
                                         ;; actually make the request now
                                         (d/chain'
                                          (fn [conn']