revert parser stmtListExpr (#11007)

* Revert "Support for stmtListExpr in parser after major keywords. Scaled down version. (#10852)"

This reverts commit 862897dc0f.

* redo fix for #4035

* render stmtlistExpr using semicolon

* Revert "render stmtlistExpr using semicolon"

This reverts commit cafb78b8d5b125b5f6ba94248377a1433b3138cb.

* revert test

changelog.md

@@ -31,16 +31,6 @@
 
 - `getImpl` on a `var` or `let` symbol will now return the full `IdentDefs`
   tree from the symbol declaration instead of just the initializer portion.
-- it is now possible to use statement list expressions after keywords with
-  indentation: raise, return, discard, yield. This helps parsing code produced
-  by Nim template expansion where stmtListExpr can appear in place of any expression.
-  Example:
-```nim
-  raise
-    var e = new(Exception)
-    e.msg = "My Exception msg"
-    e
-```
 
 - To use multi-methods, explicit `--multimethods:on` is now needed.