Remove jerry-internal.h (#1782)

The internal header was a legacy, declared two functions only. One
of them was not used anymore at all, the other was used at a single
call site. Moreover, their documentation was outdated. This patch
removes the header and the related function implementations -- as
well as the temptation to use such internal functions from outside
the library.

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

jerry-core/jrt/jrt-fatals.c

@@ -20,9 +20,6 @@
 #include "jrt.h"
 #include "jrt-libc-includes.h"
 
-#define JERRY_INTERNAL
-#include "jerry-internal.h"
-
 /*
  * Exit with specified status code.
  *