Revisit unused global functions in jerry-core (#2450)

There are some leftover global functions in the code that are not
referenced at all anymore. These functions are removed by this
patch.

There are also some global functions that are only used in their
own modules. These functions are made static by this patch.

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

jerry-core/ecma/operations/ecma-promise-object.c

@@ -53,7 +53,7 @@ ecma_is_promise (ecma_object_t *obj_p) /**< points to object */
  * @return ecma value of the promise result.
  *         Returned value must be freed with ecma_free_value
  */
-inline ecma_value_t
+static inline ecma_value_t
 ecma_promise_get_result (ecma_object_t *obj_p) /**< points to promise object */
 {
   JERRY_ASSERT (ecma_is_promise (obj_p));
@@ -66,7 +66,7 @@ ecma_promise_get_result (ecma_object_t *obj_p) /**< points to promise object */
 /**
  * Set the PromiseResult of promise.
  */
-inline void JERRY_ATTR_ALWAYS_INLINE
+static inline void JERRY_ATTR_ALWAYS_INLINE
 ecma_promise_set_result (ecma_object_t *obj_p, /**< points to promise object */
                          ecma_value_t result) /**< the result value */
 {
@@ -84,7 +84,7 @@ ecma_promise_set_result (ecma_object_t *obj_p, /**< points to promise object */
  *
  * @return the state's enum value
  */
-inline uint8_t JERRY_ATTR_ALWAYS_INLINE
+static inline uint8_t JERRY_ATTR_ALWAYS_INLINE
 ecma_promise_get_state (ecma_object_t *obj_p) /**< points to promise object */
 {
   JERRY_ASSERT (ecma_is_promise (obj_p));
@@ -95,7 +95,7 @@ ecma_promise_get_state (ecma_object_t *obj_p) /**< points to promise object */
 /**
  * Set the PromiseState of promise.
  */
-inline void JERRY_ATTR_ALWAYS_INLINE
+static inline void JERRY_ATTR_ALWAYS_INLINE
 ecma_promise_set_state (ecma_object_t *obj_p, /**< points to promise object */
                         uint8_t state) /**< the state */
 {