Do not set presence type to available

src/XMPPConnection.m

@@ -706,7 +706,6 @@
 	if (_streamOpen)
 		[_socket writeString: @"</stream:stream>"];
 
-
 	[_oldParser release];
 	_oldParser = nil;
 	[_oldElementBuilder release];

src/XMPPPresence.h

@@ -34,11 +34,6 @@ OF_ASSUME_NONNULL_BEGIN
 	OFNumber *_priority;
 }
 
-/*!
- * The value of the stanza's type attribute.
- */
-@property OF_NULL_RESETTABLE_PROPERTY (nonatomic, copy) OFString *type;
-
 /*!
  * The text content of the status element.
  */

src/XMPPPresence.m

@@ -47,7 +47,6 @@ show_to_int(OFString *show)
 }
 
 @implementation XMPPPresence
-@dynamic type;
 @synthesize status = _status, show = _show, priority = _priority;
 
 + (instancetype)presence
@@ -135,14 +134,6 @@ show_to_int(OFString *show)
 	[super dealloc];
 }
 
-- (void)setType: (OFString *)type
-{
-	if (type == nil)
-		type = @"available";
-
-	[super setType: type];
-}
-
 - (void)setShow: (OFString *)show
 {
 	OFXMLElement *oldShow = [self elementForName: @"show"