Revert "add isKotlinSourceElement method to Source interface in order to recognize kotlin source elements during compilation"

This reverts commit c342f6870a.

compiler/frontend.java/src/org/jetbrains/kotlin/load/java/components/JavaSourceElementFactoryImpl.kt

@@ -24,8 +24,6 @@ import org.jetbrains.kotlin.load.java.sources.JavaSourceElementFactory
 import org.jetbrains.kotlin.load.java.sources.JavaSourceElement
 
 private class JavaSourceElementImpl(override val javaElement: JavaElement) : PsiSourceElement, JavaSourceElement {
-    override fun isKotlinSourceElement(): Boolean = false
-
     override val psi: PsiElement?
         get() = (javaElement as JavaElementImpl<*>).getPsi()
 }

compiler/frontend/src/org/jetbrains/kotlin/resolve/source/KotlinSourceElement.kt

@@ -20,9 +20,7 @@ import org.jetbrains.kotlin.psi.JetElement
 import org.jetbrains.kotlin.descriptors.SourceElement
 import com.intellij.psi.PsiElement
 
-public class KotlinSourceElement(override val psi: JetElement) : PsiSourceElement {
-    override fun isKotlinSourceElement(): Boolean = true
-}
+public class KotlinSourceElement(override val psi: JetElement) : PsiSourceElement
 
 public fun JetElement?.toSourceElement(): SourceElement = if (this == null) SourceElement.NO_SOURCE else KotlinSourceElement(this)
 

core/descriptor.loader.java/src/org/jetbrains/kotlin/load/kotlin/KotlinJvmBinarySourceElement.kt

@@ -19,6 +19,5 @@ package org.jetbrains.kotlin.load.kotlin
 import org.jetbrains.kotlin.descriptors.SourceElement
 
 public class KotlinJvmBinarySourceElement(public val binaryClass: KotlinJvmBinaryClass) : SourceElement {
-    override fun isKotlinSourceElement(): Boolean = false
     override fun toString() = javaClass.name + ": " + binaryClass.toString()
 }

core/descriptors.runtime/src/org/jetbrains/kotlin/load/java/components/RuntimeSourceElementFactory.kt

@@ -23,8 +23,6 @@ import org.jetbrains.kotlin.load.java.structure.reflect.ReflectJavaElement
 
 public object RuntimeSourceElementFactory : JavaSourceElementFactory {
     private class RuntimeSourceElement(override val javaElement: ReflectJavaElement) : JavaSourceElement {
-
-        override fun isKotlinSourceElement(): Boolean = false
         override fun toString() = javaClass.name + ": " + javaElement.toString()
     }
 

core/descriptors.runtime/src/org/jetbrains/kotlin/load/kotlin/reflect/ReflectAnnotationSource.kt

@@ -18,6 +18,4 @@ package org.jetbrains.kotlin.load.kotlin.reflect
 
 import org.jetbrains.kotlin.descriptors.SourceElement
 
-public class ReflectAnnotationSource(public val annotation: Annotation) : SourceElement {
-    override fun isKotlinSourceElement(): Boolean = false
-}
+public class ReflectAnnotationSource(public val annotation: Annotation) : SourceElement

core/descriptors/src/org/jetbrains/kotlin/descriptors/SourceElement.java

@@ -16,18 +16,8 @@
 
 package org.jetbrains.kotlin.descriptors;
 
-import kotlin.Deprecated;
-
 public interface SourceElement {
-    @Deprecated("This is a hack in order to preliminary support internal visibility in multi-module projects")
-    boolean isKotlinSourceElement();
-
     SourceElement NO_SOURCE = new SourceElement() {
-        @Override
-        public boolean isKotlinSourceElement() {
-            return false;
-        }
-
         @Override
         public String toString() {
             return "NO_SOURCE";