Drop external annotations support in build tools

External annotations will only be considered in the IDE for additional
inspections based on more precise types in Java libraries

ant/src/org/jetbrains/kotlin/ant/Kotlin2JvmTask.kt

@@ -23,19 +23,11 @@ import java.io.File.pathSeparator
 public class Kotlin2JvmTask : KotlinCompilerBaseTask() {
     override val compilerFqName = "org.jetbrains.kotlin.cli.jvm.K2JVMCompiler"
 
-    public var externalAnnotations: Path? = null
     public var includeRuntime: Boolean = true
     public var moduleName: String? = null
 
     private var compileClasspath: Path? = null
 
-    public fun createExternalAnnotations(): Path {
-        if (externalAnnotations == null) {
-            externalAnnotations = Path(getProject())
-        }
-        return externalAnnotations!!.createPath()
-    }
-
     public fun setClasspath(classpath: Path) {
         if (compileClasspath == null) {
             compileClasspath = classpath
@@ -65,11 +57,6 @@ public class Kotlin2JvmTask : KotlinCompilerBaseTask() {
             args.add(it.list().join(pathSeparator))
         }
 
-        externalAnnotations?.let {
-            args.add("-annotations")
-            args.add(it.list().join(pathSeparator))
-        }
-
 
         if (moduleName == null) {
             moduleName = defaultModuleName