config.h maintenance (#1792)

The config header was full of legacy, no-longer-in-use defines. It
was also included from multiple files where it was not necessary.
This patch removes the unused defines, and cleans up headers so
that only `ecma-globals.h` includes `config.h`.

JerryScript-DCO-1.0-Signed-off-by: Akos Kiss akiss@inf.u-szeged.hu

jerry-core/vm/vm-stack.h

@@ -16,7 +16,6 @@
 #ifndef VM_STACK_H
 #define VM_STACK_H
 
-#include "config.h"
 #include "ecma-globals.h"
 
 /** \addtogroup vm Virtual machine