Remove the first version of the AttributedString builder

Remvoe test stuf

# Conflicts:
#	ElementX/Sources/Other/HTMLParsing/AttributedStringBuilder.swift
#	ElementX/Sources/Other/HTMLParsing/AttributedStringBuilderV1.swift
#	ElementX/Sources/Other/HTMLParsing/DTHTMLElement+AttributedStringBuilder.swift

ElementX/Sources/Screens/Settings/DeveloperOptionsScreen/DeveloperOptionsScreenModels.swift

@@ -53,7 +53,6 @@ protocol DeveloperOptionsProtocol: AnyObject {
     var knockingEnabled: Bool { get set }
     var latestEventSorterEnabled: Bool { get set }
     
-    var nextGenHTMLParserEnabled: Bool { get set }
     var linkPreviewsEnabled: Bool { get set }
 }
 

ElementX/Sources/Screens/Settings/DeveloperOptionsScreen/View/DeveloperOptionsScreen.swift

@@ -33,12 +33,6 @@ struct DeveloperOptionsScreen: View {
                 }
             }
             
-            Section("General") {
-                Toggle(isOn: $context.nextGenHTMLParserEnabled) {
-                    Text("Next gen HTML parsing")
-                }
-            }
-            
             Section("Room List") {
                 Toggle(isOn: $context.publicSearchEnabled) {
                     Text("Public search")

ElementX/Sources/Screens/Timeline/View/TimelineItemViews/FormattedBodyText.swift

@@ -135,13 +135,8 @@ struct FormattedBodyText: View {
 
 struct FormattedBodyText_Previews: PreviewProvider, TestablePreview {
     static var previews: some View {
-        body(AttributedStringBuilderV1(cacheKey: "v1", mentionBuilder: MentionBuilder()))
+        body(AttributedStringBuilder(cacheKey: "FormattedBodyText", mentionBuilder: MentionBuilder()))
             .previewLayout(.sizeThatFits)
-            .previewDisplayName("v1")
-        
-        body(AttributedStringBuilderV2(cacheKey: "v2", mentionBuilder: MentionBuilder()))
-            .previewLayout(.sizeThatFits)
-            .previewDisplayName("v2")
     }
     
     @ViewBuilder