Remove dead lines in various places

As pointed-out by clang -Wunreachable-code.

No behaviour changes.

src/shared/install.c

@@ -469,8 +469,6 @@ static int find_symlinks_fd(
                                 return 1;
                 }
         }
-
-        return r;
 }
 
 static int find_symlinks(

src/shared/time-dst.c

@@ -207,8 +207,8 @@ read_again:
                 if (type_idxs[i] >= num_types)
                         return -EINVAL;
 
-        if ((BYTE_ORDER != BIG_ENDIAN && (sizeof(time_t) == 4 || trans_width == 4)) ||
-            (BYTE_ORDER == BIG_ENDIAN && sizeof(time_t) == 8 && trans_width == 4)) {
+        if (BYTE_ORDER == BIG_ENDIAN ? sizeof(time_t) == 8 && trans_width == 4
+                                     : sizeof(time_t) == 4 || trans_width == 4) {
                 /* Decode the transition times, stored as 4-byte integers in
                    network (big-endian) byte order.  We work from the end of
                    the array so as not to clobber the next element to be