[gardening] Remove unnecessary wildcard patterns

Author: ikesyo

Foundation/Boxing.swift

@@ -180,9 +180,9 @@ extension _MutablePairBoxing {
 
         // This check is done twice becaue: <rdar://problem/24939065> Value kept live for too long causing uniqueness check to fail
         switch (wrapper) {
-        case .Immutable(_):
+        case .Immutable:
             break
-        case .Mutable(_):
+        case .Mutable:
             unique = isKnownUniquelyReferenced(&_wrapped)
         }
 

Foundation/IndexPath.swift

@@ -69,7 +69,7 @@ public struct IndexPath : ReferenceConvertible, Equatable, Hashable, MutableColl
             switch self {
             case .empty:
                 return .empty
-            case .single(_):
+            case .single:
                 return .empty
             case .pair(let first, _):
                 return .single(first)
@@ -237,7 +237,7 @@ public struct IndexPath : ReferenceConvertible, Equatable, Hashable, MutableColl
                 case .empty:
                     fatalError("index \(index) out of bounds of count 0")
                     break
-                case .single(_):
+                case .single:
                     precondition(index == 0, "index \(index) out of bounds of count 1")
                     self = .single(newValue)
                     break

Foundation/IndexSet.swift

@@ -662,9 +662,9 @@ public struct IndexSet : ReferenceConvertible, Equatable, BidirectionalCollectio
         // This check is done twice because: <rdar://problem/24939065> Value kept live for too long causing uniqueness check to fail
         var unique = true
         switch _handle._pointer {
-        case .Default(_):
+        case .Default:
             break
-        case .Mutable(_):
+        case .Mutable:
             unique = isKnownUniquelyReferenced(&_handle)
         }
 

Foundation/NSURLRequest.swift

@@ -320,7 +320,7 @@ open class NSURLRequest : NSObject, NSSecureCoding, NSCopying, NSMutableCopying
             switch body {
             case .data(let data):
                 return data
-            case .stream(_):
+            case .stream:
                 return nil
             }
         }
@@ -330,7 +330,7 @@ open class NSURLRequest : NSObject, NSSecureCoding, NSCopying, NSMutableCopying
     open var httpBodyStream: InputStream? {
         if let body = _body {
             switch body {
-            case .data(_):
+            case .data:
                 return nil
             case .stream(let stream):
                 return stream
@@ -482,7 +482,7 @@ open class NSMutableURLRequest : NSURLRequest {
                 switch body {
                 case .data(let data):
                     return data
-                case .stream(_):
+                case .stream:
                     return nil
                 }
             }
@@ -501,7 +501,7 @@ open class NSMutableURLRequest : NSURLRequest {
         get {
             if let body = _body {
                 switch body {
-                case .data(_):
+                case .data:
                     return nil
                 case .stream(let stream):
                     return stream

Foundation/URLSession/http/HTTPURLProtocol.swift

@@ -336,7 +336,7 @@ internal extension _HTTPURLProtocol {
         switch session.behaviour(for: self.task!) {
         case .noDelegate:
             break
-        case .taskDelegate(_):
+        case .taskDelegate:
             //TODO: There's a problem with libcurl / with how we're using it.
             // We're currently unable to pause the transfer / the easy handle:
             // https://curl.haxx.se/mail/lib-2016-03/0222.html