JS: removed comma expression decomposition from InlineMetadata

There are used to be two inline tags (corresponding to start, end of inline function).
An expression like "startTag, function, endTag" was parsed into comma expression, then decomposed.
Now, it's just one tag at start, and parser can read function, then stop.
Thus, there is no need to decompose comma expressions.

js/js.translator/src/org/jetbrains/kotlin/js/translate/expression/InlineMetadata.kt

@@ -38,7 +38,6 @@ public class InlineMetadata(val tag: JsStringLiteral, val function: JsFunction)
         platformStatic
         fun decompose(expression: JsExpression?): InlineMetadata? =
                 when (expression) {
-                    is JsBinaryOperation -> decomposeCommaExpression(expression)
                     is JsInvocation -> decomposeCreateFunctionCall(expression)
                     else -> null
                 }
@@ -46,33 +45,11 @@ public class InlineMetadata(val tag: JsStringLiteral, val function: JsFunction)
         private fun decomposeCreateFunctionCall(call: JsInvocation): InlineMetadata? {
             if (Namer.CREATE_INLINE_FUNCTION != call.getQualifier()) return null
 
-            return decomposePropertiesList(call.getArguments())
-        }
+            val arguments = call.getArguments()
+            if (arguments.size() != METADATA_PROPERTIES_COUNT) return null
 
-        private fun decomposeCommaExpression(expression: JsExpression): InlineMetadata? {
-            val properties = arrayListOf<JsExpression>()
-            var decomposable: JsExpression? = expression
-
-            while (decomposable is JsExpression) {
-                val binOp = decomposable as? JsBinaryOperation
-
-                if (JsBinaryOperator.COMMA == binOp?.getOperator()) {
-                    properties.add(binOp?.getArg2())
-                    decomposable = binOp?.getArg1()
-                } else {
-                    properties.add(decomposable)
-                    break
-                }
-            }
-
-            return decomposePropertiesList(properties.reverse())
-        }
-
-        private fun decomposePropertiesList(properties: List<JsExpression>): InlineMetadata? {
-            if (properties.size() != METADATA_PROPERTIES_COUNT) return null
-
-            val tag = properties[0] as? JsStringLiteral
-            val function = properties[1] as? JsFunction
+            val tag = arguments[0] as? JsStringLiteral
+            val function = arguments[1] as? JsFunction
             if (tag == null || function == null) return null
 
             return InlineMetadata(tag, function)