Fix "is removable field" check

Author: EgorBo

src/coreclr/jit/fginline.cpp

@@ -1608,7 +1608,8 @@ Statement* Compiler::fgInlinePrependStatements(InlineInfo* inlineInfo)
                             GenTree* op2 = argNode->AsOp()->gtOp2;
                             if (op1->IsCall() &&
                                 ((op1->AsCall()->gtCallMoreFlags & GTF_CALL_M_HELPER_SPECIAL_DCE) != 0) &&
-                                (op2->OperIs(GT_IND, GT_FIELD)) && ((op2->gtFlags & GTF_EXCEPT) == 0))
+                                op2->OperIs(GT_IND) && op2->gtGetOp1()->IsIconHandle() &&
+                                ((op2->gtFlags & GTF_EXCEPT) == 0))
                             {
                                 JITDUMP("\nPerforming special dce on unused arg [%06u]:"
                                         " actual arg [%06u] helper call [%06u]\n",