drop deprecated @platformName and @platformStatic annotations

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

@@ -1,5 +1,3 @@
-import kotlin.platform.platformStatic
-
 var holder = ""
 
 fun getA(): A {
@@ -9,13 +7,13 @@ fun getA(): A {
 
 object A {
 
-    @platformStatic var a: Int = 1
+    @JvmStatic var a: Int = 1
 
     var b: Int = 1
-        @platformStatic get
+        @JvmStatic get
 
     var c: Int = 1
-        @platformStatic set
+        @JvmStatic set
 
 }