Undo accidental changes

SignalServiceKit/src/Messages/Interactions/OWSLinkPreview.swift

@@ -655,13 +655,11 @@ public class OWSLinkPreview: MTLModel {
                                 return
                             }
                             if let contentType = response.allHeaderFields["Content-Type"] as? String {
-                                /*
                                 guard contentType.lowercased().hasPrefix("text/") else {
                                     Logger.warn("Invalid content type: \(contentType).")
                                     resolver.reject(LinkPreviewError.invalidContent)
                                     return
                                 }
-                                 */
                             }
                             guard let data = value as? Data else {
                                 Logger.warn("Result is not data: \(type(of: value)).")
@@ -867,7 +865,7 @@ public class OWSLinkPreview: MTLModel {
                     return Promise.value(OWSLinkPreviewDraft(urlString: linkUrlString, title: title))
             }
         } catch {
-            // owsFailDebug("Could not parse link data: \(error).")
+            owsFailDebug("Could not parse link data: \(error).")
             return Promise(error: error)
         }
     }
@@ -878,7 +876,7 @@ public class OWSLinkPreview: MTLModel {
     //    <meta property="og:image" content="https://i.ytimg.com/vi/tP-Ipsat90c/maxresdefault.jpg">
     class func parse(linkData: Data) throws -> OWSLinkPreviewContents {
         guard let linkText = String(bytes: linkData, encoding: .utf8) else {
-            // owsFailDebug("Could not parse link text.")
+            owsFailDebug("Could not parse link text.")
             throw LinkPreviewError.invalidInput
         }