Remove dead code

Neither of these clauses can ever be reached.

Also attempt to fix travis Windows build

.travis/cmake-windows.sh

@@ -25,6 +25,9 @@ travis_script() {
   # its backtrace.
   add_flag -gdwarf-2
 
+  # Fix invalid register for .seh_savexmm error
+  add_flag -fno-asynchronous-unwind-tables
+
   docker run \
     -e ALLOW_TEST_FAILURE=true \
     -e ENABLE_ARCH_i686="$i686" \

other/bootstrap_daemon/docker/tox-bootstrapd.sha256

@@ -1 +1 @@
-2b75296c24edbefa40809eeef66fa74791e28da407ee9364fb8e516c2ee882aa  /usr/local/bin/tox-bootstrapd
+7e3bf0d47ff9440c7dd629b721b19846171c08b68762c043d6ce04b1b73ad8e0  /usr/local/bin/tox-bootstrapd

toxcore/DHT.c

@@ -895,14 +895,6 @@ static int cmp_dht_entry(const void *a, const void *b)
         return 1;
     }
 
-    if (t1 && !t2) {
-        return -1;
-    }
-
-    if (!t1 && t2) {
-        return 1;
-    }
-
     const int close = id_closest(cmp_public_key, entry1.public_key, entry2.public_key);
 
     if (close == 1) {