Revert "make default values typed in proc AST same as param sym AST (#…

…24184)"

This reverts commit c21bf7f.

compiler/semtypes.nim

@@ -1409,8 +1409,6 @@ proc semProcTypeNode(c: PContext, n, genericParams: PNode,
         elif typ.kind == tyStatic:
           def = semConstExpr(c, def)
           def = fitNode(c, typ, def, def.info)
-      # keep proc AST updated
-      a[^1] = def
 
     if not hasType and not hasDefault:
       if isType: localError(c.config, a.info, "':' expected")

tests/errmsgs/tunknown_named_parameter.nim

@@ -10,8 +10,8 @@ func rsplit(s: string; sep: string; maxsplit: int = -1): seq[string]
   first type mismatch at position: 2
   required type for sep: string
   but expression '{':'}' is of type: set[char]
-func rsplit(s: string; seps: set[char] = {' ', '\t', '\v', '\r', '\n', '\f'};
-            maxsplit: int = -1): seq[string]
+func rsplit(s: string; seps: set[char] = Whitespace; maxsplit: int = -1): seq[
+    string]
   first type mismatch at position: 3
   unknown named parameter: maxsplits