Remove config.h.include which is no longer needed as pbconfig.h is not a
generated file now.

Change-Id: I68b397e7fa9248abc93d5c12efd5cd31e380c9ab
diff --git a/config.h.include b/config.h.include
deleted file mode 100644
index 0c557fb..0000000
--- a/config.h.include
+++ /dev/null
@@ -1,7 +0,0 @@
-HASH_MAP_CLASS
-HASH_MAP_H
-HASH_NAMESPACE
-HASH_SET_CLASS
-HASH_SET_H
-HAVE_HASH_MAP
-HAVE_HASH_SET