[Wasm] stdlib NFC: Fix or suppress remaining warnings

libraries/stdlib/wasm/internal/kotlin/wasm/internal/Coroutines.kt

@@ -16,7 +16,7 @@ internal fun <T> getContinuation(): Continuation<T> =
 
 @PublishedApi
 @Suppress("UNCHECKED_CAST")
-internal suspend fun <T> returnIfSuspended(@Suppress("UNUSED_PARAMETER") argument: Any?): T =
+internal suspend fun <T> returnIfSuspended(argument: Any?): T =
     argument as T
 
 @PublishedApi
@@ -33,6 +33,7 @@ internal suspend fun getCoroutineContext(): CoroutineContext = getContinuation<A
 internal suspend fun <T> suspendCoroutineUninterceptedOrReturn(block: (Continuation<T>) -> Any?): T =
     returnIfSuspended<T>(block(getContinuation<T>()))
 
+@Suppress("UNUSED_PARAMETER")
 @ExcludedFromCodegen
 @PublishedApi
 internal fun <T> startCoroutineUninterceptedOrReturnIntrinsic0(
@@ -42,6 +43,7 @@ internal fun <T> startCoroutineUninterceptedOrReturnIntrinsic0(
     implementedAsIntrinsic
 }
 
+@Suppress("UNUSED_PARAMETER")
 @ExcludedFromCodegen
 @PublishedApi
 internal fun <R, T> startCoroutineUninterceptedOrReturnIntrinsic1(
@@ -52,6 +54,7 @@ internal fun <R, T> startCoroutineUninterceptedOrReturnIntrinsic1(
     implementedAsIntrinsic
 }
 
+@Suppress("UNUSED_PARAMETER")
 @ExcludedFromCodegen
 @PublishedApi
 internal fun <R, P, T> startCoroutineUninterceptedOrReturnIntrinsic2(

libraries/stdlib/wasm/internal/kotlin/wasm/internal/ExceptionHelpers.kt

@@ -14,11 +14,10 @@ package kotlin.wasm.internal
         throw error;
    }"""
 )
-private external fun throwJsError(message: String?, wasmTypeName: String?, stack: String)
+private external fun throwJsError(message: String?, wasmTypeName: String?, stack: String): Nothing
 
 internal fun throwAsJsException(t: Throwable): Nothing {
     throwJsError(t.message, t::class.simpleName, t.stackTraceToString())
-    return error("Unreachable")
 }
 
 internal var isNotFirstWasmExportCall: Boolean = false

libraries/stdlib/wasm/internal/kotlin/wasm/internal/Runtime.kt

@@ -3,6 +3,8 @@
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 
+@file:Suppress("UNUSED_PARAMETER")  // File contains many intrinsics
+
 package kotlin.wasm.internal
 
 internal const val CHAR_SIZE_BYTES = 2
@@ -115,5 +117,6 @@ internal fun stringGetPoolSize(): Int =
     implementedAsIntrinsic
 
 // This initializer is a special case in FieldInitializersLowering
+@Suppress("DEPRECATION")
 @EagerInitialization
 internal val stringPool: Array<String?> = arrayOfNulls(stringGetPoolSize())

libraries/stdlib/wasm/internal/kotlin/wasm/internal/TypeInfo.kt

@@ -51,6 +51,7 @@ internal fun isInterfaceById(obj: Any, interfaceId: Int): Boolean {
     return false
 }
 
+@Suppress("UNUSED_PARAMETER")
 @ExcludedFromCodegen
 internal fun <T> wasmIsInterface(obj: Any): Boolean =
     implementedAsIntrinsic

libraries/stdlib/wasm/internal/kotlin/wasm/internal/WasmInstructions.kt

@@ -4,7 +4,7 @@
  */
 
 @file:ExcludedFromCodegen
-@file:Suppress("unused", "NON_ABSTRACT_FUNCTION_WITH_NO_BODY", "INLINE_CLASS_IN_EXTERNAL_DECLARATION")
+@file:Suppress("unused", "NON_ABSTRACT_FUNCTION_WITH_NO_BODY", "INLINE_CLASS_IN_EXTERNAL_DECLARATION", "UNUSED_PARAMETER")
 
 
 package kotlin.wasm.internal