drop deprecated @platformName and @platformStatic annotations

compiler/testData/codegen/boxWithStdlib/jvmStatic/closure.kt

@@ -1,16 +1,14 @@
-import kotlin.platform.platformStatic
-
 object A {
 
     val b: String = "OK"
 
-    @platformStatic val c: String = "OK"
+    @JvmStatic val c: String = "OK"
 
-    @platformStatic fun test1() : String {
+    @JvmStatic fun test1() : String {
         return {b}()
     }
 
-    @platformStatic fun test2() : String {
+    @JvmStatic fun test2() : String {
         return {test1()}()
     }
 
@@ -18,11 +16,11 @@ object A {
         return {"1".test5()}()
     }
 
-    @platformStatic fun test4(): String {
+    @JvmStatic fun test4(): String {
         return {"1".test5()}()
     }
 
-    @platformStatic fun String.test5() : String {
+    @JvmStatic fun String.test5() : String {
         return {this + b}()
     }