Simplify superclass class_declaration rule

Co-authored-by: Rob Rix <[email protected]>

Author: rnkaufman

languages/tree-sitter-stack-graphs-java/src/stack-graphs.tsg

@@ -125,7 +125,7 @@ attribute node_symbol = node            => symbol = (source-text node), source_n
 
 (class_declaration
   superclass: (superclass
-    (type_identifier) @superclass_name)
+    (_) @superclass_name)
     body: (class_body) @class_body) @class {
 
     node ref
@@ -150,14 +150,6 @@ attribute node_symbol = node            => symbol = (source-text node), source_n
     edge @class.type -> ref
 }
 
-(class_declaration
-  superclass: (superclass
-    (generic_type
-      (type_identifier)) @superclass_name)) @class {
-    edge @superclass_name.lexical_scope -> @class.lexical_scope
-}
-
-
 (class_declaration (type_parameters)) @class {
   node @class.type_parameters
   edge @class.lexical_scope -> @class.type_parameters