Minor changes to discardable handling (#8155)

compiler/semexprs.nim

@@ -908,19 +908,6 @@ proc buildEchoStmt(c: PContext, n: PNode): PNode =
 
 proc semExprNoType(c: PContext, n: PNode): PNode =
   result = semExpr(c, n, {efWantStmt})
-  # make an 'if' expression an 'if' statement again for backwards
-  # compatibility (.discardable was a bad idea!); bug #6980
-  var isStmt = false
-  if result.kind == nkIfExpr:
-    isStmt = true
-    for condActionPair in result:
-      let action = condActionPair.lastSon
-      if not implicitlyDiscardable(action) and not
-          endsInNoReturn(action):
-        isStmt = false
-    if isStmt:
-      result.kind = nkIfStmt
-      result.typ = nil
   discardCheck(c, result)
 
 proc isTypeExpr(n: PNode): bool =