Revert "[Concurrency] Hashable funcs should be inlinable for AsyncStream"

This reverts commit 06bb718.

Author: DougGregor

stdlib/public/Concurrency/AsyncStream.swift

@@ -177,7 +177,6 @@ public struct AsyncStream<Element> {
       case bufferingNewest(Int)
     }
 
-    @usableFromInline
     let storage: _Storage
 
     /// Resume the task awaiting the next iteration point by having it return
@@ -478,17 +477,14 @@ extension AsyncStream.Continuation.YieldResult: Sendable where Element: Sendable
 
 @available(SwiftStdlib 6.2, *)
 extension AsyncStream.Continuation: Hashable {
-  @inlinable
   @available(SwiftStdlib 6.2, *)
   public func hash(into hasher: inout Hasher) {
     return hasher.combine(ObjectIdentifier(storage))
   }
-  @inlinable
   @available(SwiftStdlib 6.2, *)
   public var hashValue: Int {
     return _hashValue(for: self)
   }
-  @inlinable
   @available(SwiftStdlib 6.2, *)
   public static func == (lhs: Self, rhs: Self) -> Bool {
     return lhs.storage === rhs.storage

stdlib/public/Concurrency/AsyncStreamBuffer.swift

@@ -55,7 +55,6 @@ func _unlock(_ ptr: UnsafeRawPointer)
 @available(SwiftStdlib 5.1, *)
 extension AsyncStream {
   @safe
-  @usableFromInline
   internal final class _Storage: @unchecked Sendable {
     typealias TerminationHandler = @Sendable (Continuation.Termination) -> Void
 
@@ -282,7 +281,6 @@ extension AsyncStream {
 @available(SwiftStdlib 5.1, *)
 extension AsyncThrowingStream {
   @safe
-  @usableFromInline
   internal final class _Storage: @unchecked Sendable {
     typealias TerminationHandler = @Sendable (Continuation.Termination) -> Void
     enum Terminal {

stdlib/public/Concurrency/AsyncThrowingStream.swift

@@ -199,7 +199,6 @@ public struct AsyncThrowingStream<Element, Failure: Error> {
       case bufferingNewest(Int)
     }
 
-    @usableFromInline
     let storage: _Storage
 
     /// Resume the task awaiting the next iteration point by having it return
@@ -524,17 +523,14 @@ extension AsyncThrowingStream.Continuation.YieldResult: Sendable where Element:
 
 @available(SwiftStdlib 6.2, *)
 extension AsyncThrowingStream.Continuation: Hashable {
-  @inlinable
   @available(SwiftStdlib 6.2, *)
   public func hash(into hasher: inout Hasher) {
     return hasher.combine(ObjectIdentifier(storage))
   }
-  @inlinable
   @available(SwiftStdlib 6.2, *)
   public var hashValue: Int {
     return _hashValue(for: self)
   }
-  @inlinable
   @available(SwiftStdlib 6.2, *)
   public static func == (lhs: Self, rhs: Self) -> Bool {
     return lhs.storage === rhs.storage