Remove MediaSegment equality function

Use the autogenerated equality function. This required fixing segment
name parsing. Previously the parser would return an empty string for
no name in an #EXTINF tag. Empty names should be nil instead. This was
not an issue because the equality function didn’t account for the
name.

Sources/Parsing/Tags.swift

@@ -19,8 +19,7 @@ let EXTXINDEPENDENTSEGMENTS = { _ in Tag.independentSegments } <^> "#EXT-X-INDEP
 let EXTXSTART = Tag.startIndicator <^> ( StartIndicator.init <^!> ( "#EXT-X-START:" *> attributeList ))
 
 // MARK: Media Segment Tags
-
-let EXTINF = Tag.MediaPlaylist.Segment.inf <^> "#EXTINF:" *> (( decimalFloatingPoint <|> decimalInteger ) <* character { $0 == "," } <&> ({ (characters :[Character]) -> String in return String(characters) } <^!> (CharacterSet.newlines.inverted).parser().many))
+let EXTINF = Tag.MediaPlaylist.Segment.inf <^> "#EXTINF:" *> (( decimalFloatingPoint <|> decimalInteger ) <* character { $0 == "," } <&> ({ String($0) } <^> (CharacterSet.newlines.inverted).parser().many1).optional)
 
 let EXTXBYTERANGE = Tag.MediaPlaylist.Segment.byteRange <^> ( "#EXT-X-BYTERANGE:" *> TypeParser.byteRange )
 

Sources/Types/HLSCore.swift

@@ -161,14 +161,7 @@ public struct MediaSegment {
 
 }
 
-extension MediaSegment : Equatable {
-    public static func ==(lhs: MediaSegment, rhs: MediaSegment) -> Bool {
-        return lhs.resource == rhs.resource
-            && lhs.title ?? "" == rhs.title ?? ""
-            && lhs.byteRange == rhs.byteRange
-            && lhs.duration == rhs.duration
-    }
-}
+extension MediaSegment : Equatable { }
 
 public struct MediaInitializationSection {
     public let uri: URL