CLI: remove obsolete -Xdump-declarations-to

It was only used in the very old version of binary compatibility
validator. It was never supported in the JVM IR backend.

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/jvmArguments.kt

@@ -322,8 +322,6 @@ fun CompilerConfiguration.configureAdvancedJvmOptions(arguments: K2JVMCompilerAr
         messageCollector.report(INFO, "Using preview Java language features")
     }
 
-    arguments.declarationsOutputPath?.let { put(JVMConfigurationKeys.DECLARATIONS_JSON_PATH, it) }
-
     val nThreadsRaw = parseBackendThreads(arguments.backendThreads, messageCollector)
     val nThreads = if (nThreadsRaw == 0) Runtime.getRuntime().availableProcessors() else nThreadsRaw
     if (nThreads > 1) {