Implement bugprone-branch-clone compliance

As part of getting the clang-tidy bugprone tests running, these
conditionals were found to have duplicate entries, or be somewhat
nonsensical.

Tested: clang-tidy now passes with the branch-compliance check set.
Change-Id: Ibec106f3bbd866fc471a1fc56bd8cdd5d44024e0
diff --git a/include/openbmc_dbus_rest.hpp b/include/openbmc_dbus_rest.hpp
index f8d5d4a..6bb09d0 100644
--- a/include/openbmc_dbus_rest.hpp
+++ b/include/openbmc_dbus_rest.hpp
@@ -1112,23 +1112,7 @@
             thisElement = &response.back();
         }
 
-        if (typeCode == "s")
-        {
-            r = readMessageItem<char*>(typeCode, m, *thisElement);
-            if (r < 0)
-            {
-                return r;
-            }
-        }
-        else if (typeCode == "g")
-        {
-            r = readMessageItem<char*>(typeCode, m, *thisElement);
-            if (r < 0)
-            {
-                return r;
-            }
-        }
-        else if (typeCode == "o")
+        if (typeCode == "s" || typeCode == "g" || typeCode == "o")
         {
             r = readMessageItem<char*>(typeCode, m, *thisElement);
             if (r < 0)