Availability and symbol adjustments

- abandon abi compatibility attempts, since it doesn’t work
- adjust visionOS availability

Author: glessard

Sources/FoundationEssentials/Data/Data.swift

@@ -2203,8 +2203,7 @@ public struct Data : Equatable, Hashable, RandomAccessCollection, MutableCollect
         return try _representation.withUnsafeBytes(body)
     }
 
-    @abi(var _aeic_bytes: RawSpan)
-    @available(macOS 10.14.4, iOS 12.2, watchOS 5.2, tvOS 12.2, *)
+    @available(macOS 10.14.4, iOS 12.2, watchOS 5.2, tvOS 12.2, visionOS 1.1, *)
     @_alwaysEmitIntoClient
     public var bytes: RawSpan {
         @lifetime(borrow self)
@@ -2232,13 +2231,7 @@ public struct Data : Equatable, Hashable, RandomAccessCollection, MutableCollect
         }
     }
 
-    @abi(var bytes: RawSpan)
-    @available(*, unavailable)
-    @usableFromInline
-    internal var _abi_compatibility_bytes: RawSpan { bytes }
-
-    @abi(var _aeic_span: Span<UInt8>)
-    @available(macOS 10.14.4, iOS 12.2, watchOS 5.2, tvOS 12.2, *)
+    @available(macOS 10.14.4, iOS 12.2, watchOS 5.2, tvOS 12.2, visionOS 1.1, *)
     @_alwaysEmitIntoClient
     public var span: Span<UInt8> {
         @lifetime(borrow self)
@@ -2248,13 +2241,7 @@ public struct Data : Equatable, Hashable, RandomAccessCollection, MutableCollect
         }
     }
 
-    @abi(var span: Span<UInt8>)
-    @available(*, unavailable)
-    @usableFromInline
-    internal var _abi_compatibility_span: Span<UInt8> { span }
-
-    @abi(var _aeic_mutableBytes: MutableRawSpan)
-    @available(macOS 10.14.4, iOS 12.2, watchOS 5.2, tvOS 12.2, *)
+    @available(macOS 10.14.4, iOS 12.2, watchOS 5.2, tvOS 12.2, visionOS 1.1, *)
     @_alwaysEmitIntoClient
     public var mutableBytes: MutableRawSpan {
         @lifetime(&self)
@@ -2282,13 +2269,7 @@ public struct Data : Equatable, Hashable, RandomAccessCollection, MutableCollect
         }
     }
 
-    @abi(var mutableBytes: MutableRawSpan)
-    @available(*, unavailable)
-    @usableFromInline
-    internal var _abi_compatibility_mutableBytes: MutableRawSpan { mutating get { mutableBytes } }
-
-    @abi(var _aeic_mutableSpan: MutableSpan<UInt8>)
-    @available(macOS 10.14.4, iOS 12.2, watchOS 5.2, tvOS 12.2, *)
+    @available(macOS 10.14.4, iOS 12.2, watchOS 5.2, tvOS 12.2, visionOS 1.1, *)
     @_alwaysEmitIntoClient
     public var mutableSpan: MutableSpan<UInt8> {
         @lifetime(&self)
@@ -2322,11 +2303,6 @@ public struct Data : Equatable, Hashable, RandomAccessCollection, MutableCollect
         }
     }
 
-    @abi(var mutableSpan: MutableSpan<UInt8>)
-    @available(*, unavailable)
-    @usableFromInline
-    internal var _abi_compatibility_mutableSpan: MutableSpan<UInt8> { mutating get { mutableSpan } }
-
     @_alwaysEmitIntoClient
     public func withContiguousStorageIfAvailable<ResultType>(_ body: (_ buffer: UnsafeBufferPointer<UInt8>) throws -> ResultType) rethrows -> ResultType? {
         return try _representation.withUnsafeBytes {