eliminate code related to --no-ir-gen

tests_lit/reader_tests/call.ll

 ; Test handling of call instructions.
 
 ; RUN: %p2i -i %s --insts --args -allow-externally-defined-symbols \
 ; RUN: | FileCheck %s
-; RUN: %if --need=allow_disable_ir_gen --command \
-; RUN:   %p2i -i %s --args -notranslate -timing -no-ir-gen \
-; RUN:        -allow-externally-defined-symbols \
-; RUN: | %if --need=allow_disable_ir_gen --command \
+; RUN:   %p2i -i %s --args -notranslate -timing \
+; RUN:        -allow-externally-defined-symbols | \
 ; RUN:   FileCheck --check-prefix=NOIR %s
 
 define internal i32 @fib(i32 %n) {
 entry:
   %cmp = icmp slt i32 %n, 2
   br i1 %cmp, label %return, label %if.end
 
 if.end:                                           ; preds = %entry
   %sub = add i32 %n, -1
   %call = tail call i32 @fib(i32 %sub)
@@ skipping 87 matching lines @@
 ; CHECK-NEXT:   %n.tr3 = phi i32 [ %call.i, %if.then ], [ %n, %entry ]
 ; CHECK-NEXT:   %sub = add i32 %n.tr3, -1
 ; CHECK-NEXT:   %call.i = call i32 @redirect_target(i32 %sub)
 ; CHECK-NEXT:   %cmp = icmp sgt i32 %call.i, 0
 ; CHECK-NEXT:   br i1 %cmp, label %if.then, label %if.end
 ; CHECK-NEXT: if.end:
 ; CHECK-NEXT:   ret void
 ; CHECK-NEXT: }
 
 ; NOIR: Total across all functions