Was only ever filled with one Etype (TFORW) and only used
in one place. Easier to just check for TFORW.
Change-Id: Icc96da3a22b0af1d7e60bc5841c744916c53341e
Reviewed-on: https://go-review.googlesource.com/c/147285
Reviewed-by: Martin Möhrmann <moehrmann@google.com>
 var simtype [NTYPE]types.EType
 
 var (
-       isforw    [NTYPE]bool
        isInt     [NTYPE]bool
        isFloat   [NTYPE]bool
        isComplex [NTYPE]bool
 
                        return lsym
                }
                // TODO(mdempsky): Investigate whether this can happen.
-               if isforw[tbase.Etype] {
+               if tbase.Etype == TFORW {
                        return lsym
                }
        }
 
        isComplex[TCOMPLEX64] = true
        isComplex[TCOMPLEX128] = true
 
-       isforw[TFORW] = true
-
        // initialize okfor
        for et := types.EType(0); et < NTYPE; et++ {
                if isInt[et] || et == TIDEAL {