minor: remove unused class

plugins/scripting/scripting-compiler/src/org/jetbrains/kotlin/scripting/compiler/plugin/impl/jvmCompilationUtil.kt

@@ -21,7 +21,6 @@ import org.jetbrains.kotlin.scripting.compiler.plugin.dependencies.ScriptsCompil
 import org.jetbrains.kotlin.scripting.resolve.ScriptLightVirtualFile
 import org.jetbrains.kotlin.scripting.scriptFileName
 import org.jetbrains.kotlin.utils.addToStdlib.firstIsInstanceOrNull
-import java.io.Serializable
 import java.util.*
 import kotlin.script.experimental.api.*
 import kotlin.script.experimental.host.FileBasedScriptSource
@@ -100,16 +99,6 @@ internal fun getScriptKtFile(
     }
 }
 
-class SourceCodeImpl(file: KtFile) : SourceCode, Serializable {
-    override val text: String = file.text
-    override val name: String? = file.name
-    override val locationId: String? = file.virtualFilePath
-
-    companion object {
-        private const val serialVersionUID = 1L
-    }
-}
-
 internal fun makeCompiledScript(
     generationState: GenerationState,
     script: SourceCode,