Get rid of deprecated annotations and modifiers in project code

compiler/backend-common/src/org/jetbrains/kotlin/backend/common/CodegenUtilKt.kt

@@ -26,7 +26,6 @@ import org.jetbrains.kotlin.types.JetType
 import org.jetbrains.kotlin.types.isDynamic
 import org.jetbrains.kotlin.utils.keysToMapExceptNulls
 import java.util.Comparator
-import kotlin.platform.platformStatic
 
 public object CodegenUtilKt {
 
@@ -35,7 +34,8 @@ public object CodegenUtilKt {
     //   toTrait = Bar
     //   delegateExpressionType = typeof(baz)
     // return Map<member of Foo, corresponding member of typeOf(baz)>
-    public platformStatic fun getDelegates(
+    @JvmStatic
+    public fun getDelegates(
             descriptor: ClassDescriptor,
             toTrait: ClassDescriptor,
             delegateExpressionType: JetType? = null

compiler/backend-common/src/org/jetbrains/kotlin/backend/common/bridges/bridges.kt

@@ -56,7 +56,7 @@ public fun <Function : FunctionHandle, Signature> generateBridges(
         // If it's a concrete fake override, some of the bridges may be inherited from the super-classes. Specifically, bridges for all
         // declarations that are reachable from all concrete immediate super-functions of the given function. Note that all such bridges are
         // guaranteed to delegate to the same implementation as bridges for the given function, that's why it's safe to inherit them
-        @suppress("UNCHECKED_CAST")
+        @Suppress("UNCHECKED_CAST")
         for (overridden in function.getOverridden() as Iterable<Function>) {
             if (!overridden.isAbstract) {
                 bridgesToGenerate.removeAll(findAllReachableDeclarations(overridden).map(signature))
@@ -77,7 +77,7 @@ private fun <Function : FunctionHandle> findAllReachableDeclarations(function: F
             }
         }
     }
-    @suppress("UNCHECKED_CAST")
+    @Suppress("UNCHECKED_CAST")
     DFS.dfs(listOf(function), { it.getOverridden() as Iterable<Function> }, collector)
     return HashSet(collector.result())
 }