Remove redundant funcspec-for-literal-constant=true in lit test

Author: hazzlim

llvm/test/Transforms/FunctionSpecialization/literal-const.ll

@@ -2,7 +2,6 @@
 ; RUN:        -funcspec-for-literal-constant=false \
 ; RUN:        -force-specialization < %s | FileCheck %s -check-prefix CHECK-NOLIT
 ; RUN: opt -S --passes="ipsccp<func-spec>" \
-; RUN:        -funcspec-for-literal-constant=true \
 ; RUN:        -force-specialization < %s | FileCheck %s -check-prefix CHECK-LIT
 
 define i32 @f0(i32 noundef %x) {