Make parentheses no longer explicit in the AST (Beta).

The output module adds parentheses where necessary, depending on the evaluation order in the tree. Or that's the idea. Prone to bugs, let's see how it bodes.

lslopt/lsloptimizer.py

@@ -31,13 +31,6 @@ class optimizer(foldconst, renamer, deadcode):
         # value unchanged
         if value['t'] == newtype:
             return value
-        if value not in ('CONST','()','FLD','IDENT','FNCALL','V++','V--',
-                         'VECTOR','ROTATION','LIST'):
-            value = {'nt':'()', 't':newtype, 'ch':[value]}
-            if 'SEF' in value['ch'][0]:
-                value['SEF'] = True
-            if 'X' in value['ch'][0]:
-                value['X'] = value['ch'][0]['X']
         ret = {'nt':'CAST', 't':newtype, 'ch':[value]}
         if 'SEF' in value:
             ret['SEF'] = True