Removed the unnecessary "fullPath" computed property from the Resource model in the library target.

Sources/HummingbirdDocC/Internal/Models/Resource.swift

@@ -11,7 +11,7 @@
 // ===----------------------------------------------------------------------===
 
 /// A model that encapsulates the information related to a resource in a given `DocC` documentation archive.
-struct Resource {
+struct Resource: Equatable {
     
     // MARK: Properties
     
@@ -38,18 +38,13 @@ struct Resource {
     // MARK: Computed
     
     /// A relative URI path to a documentation archive the resource belongs to.
-    lazy var archivePath: String = {
+    var archivePath: String {
         .init(format: .Format.Path.archive, archiveName)
-    }()
+    }
     
     /// A reference name for the documentation archive the resource belongs to.
-    lazy var archiveReference: String = {
+    var archiveReference: String {
         archiveName.lowercased()
-    }()
-    
-    /// A relative URI path to the resource in its documentation archive.
-    lazy var fullPath: String = {
-        .init(format: .Format.Path.archive, archiveName, relativePath)
-    }()
+    }
     
 }