[PRISM] Enable more passing parsing tests

test/.excludes-prism/TestParse.rb

@@ -1,10 +1,4 @@
-exclude(:test_alias_backref, "unknown")
-exclude(:test_bad_arg, "unknown")
-exclude(:test_block_dup, "unknown")
-exclude(:test_class_module, "unknown")
-exclude(:test_disallowed_class_variable, "unknown")
 exclude(:test_disallowed_gloal_variable, "unknown")
-exclude(:test_disallowed_instance_variable, "unknown")
 exclude(:test_dynamic_constant_assignment, "unknown")
 exclude(:test_else_without_rescue, "unknown")
 exclude(:test_embedded_rd_error, "unknown")
@@ -16,8 +10,6 @@ exclude(:test_here_document, "unknown")
 exclude(:test_heredoc_unterminated_interpolation, "unknown")
 exclude(:test_invalid_break_from_class_definition, "unknown")
 exclude(:test_invalid_char, "unknown")
-exclude(:test_invalid_class_variable, "unknown")
-exclude(:test_invalid_instance_variable, "unknown")
 exclude(:test_invalid_next_from_class_definition, "unknown")
 exclude(:test_location_of_invalid_token, "unknown")
 exclude(:test_no_blockarg, "unknown")