Remove obsolete diagnostics suppression

The diagnostic NON_PUBLIC_PRIMARY_CONSTRUCTOR_OF_INLINE_CLASS is now
obsolete because internal constructors of inline classes became allowed.

libraries/stdlib/unsigned/src/kotlin/UInt.kt

@@ -9,7 +9,6 @@ package kotlin
 
 import kotlin.experimental.*
 
-@Suppress("NON_PUBLIC_PRIMARY_CONSTRUCTOR_OF_INLINE_CLASS")
 @SinceKotlin("1.3")
 @ExperimentalUnsignedTypes
 public inline class UInt @PublishedApi internal constructor(@PublishedApi internal val data: Int) : Comparable<UInt> {