drop deprecated @platformName and @platformStatic annotations

compiler/testData/compileJavaAgainstKotlin/platformStatic/simpleObject.kt

@@ -1,19 +1,17 @@
 package test
 
-import kotlin.platform.platformStatic
-
 object A {
 
     val b: String = "OK"
 
-    @platformStatic fun test1() {
+    @JvmStatic fun test1() {
         b
         test2()
         test3()
         "".test4()
     }
 
-    @platformStatic fun test2() {
+    @JvmStatic fun test2() {
         b
     }
 
@@ -21,7 +19,7 @@ object A {
 
     }
 
-    @platformStatic fun String.test4() {
+    @JvmStatic fun String.test4() {
         b
     }
 }