Remove leftovers of platformName and platformStatic in test data

Drop unnecessary imports, rename some tests

compiler/testData/diagnostics/testsWithStdLib/annotations/jvmStatic/constructors.kt

@@ -1,4 +1,3 @@
-import kotlin.jvm.JvmStatic
 class A {
     <!WRONG_ANNOTATION_TARGET!>@JvmStatic<!> constructor() {}
     inner class B {

compiler/testData/diagnostics/testsWithStdLib/annotations/jvmStatic/finalAndAbstract.kt

@@ -1,6 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE
-import kotlin.jvm.JvmStatic
-
 abstract class A {
 
     open fun a() {}

compiler/testData/diagnostics/testsWithStdLib/annotations/jvmStatic/functions.kt

@@ -1,6 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE
-import kotlin.jvm.JvmStatic
-
 class A {
     companion object {
         @JvmStatic fun a1() {

compiler/testData/diagnostics/testsWithStdLib/annotations/jvmStatic/localFun.kt

@@ -1,6 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE
-import kotlin.jvm.JvmStatic
-
 fun main(args: Array<String>) {
     <!JVM_STATIC_NOT_IN_OBJECT!>@JvmStatic fun a()<!>{
 

compiler/testData/diagnostics/testsWithStdLib/annotations/jvmStatic/property.kt

@@ -1,6 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE
-import kotlin.jvm.JvmStatic
-
 open class B {
     public open val base1 : Int = 1
     public open val base2 : Int = 1