revert discardable transformation (#10905)

* Revert "Properly wrap discarded statements (#10322)"

This reverts commit 15584879b9.

* add test for implicit discard after defer
* enable t10241 again
* make C++ tests green again

compiler/cgen.nim

@@ -440,6 +440,15 @@ proc getTemp(p: BProc, t: PType, result: var TLoc; needsInit=false) =
   result.flags = {}
   constructLoc(p, result, not needsInit)
 
+proc getTempCpp(p: BProc, t: PType, result: var TLoc; value: Rope) =
+  inc(p.labels)
+  result.r = "T" & rope(p.labels) & "_"
+  linefmt(p, cpsStmts, "$1 $2 = $3;$n", [getTypeDesc(p.module, t), result.r, value])
+  result.k = locTemp
+  result.lode = lodeTyp t
+  result.storage = OnStack
+  result.flags = {}
+
 proc getIntTemp(p: BProc, result: var TLoc) =
   inc(p.labels)
   result.r = "T" & rope(p.labels) & "_"