Inline and remove cast_shift_rhs.

It has a single call site.

Author: nnethercote

compiler/rustc_codegen_ssa/src/base.rs

@@ -340,15 +340,6 @@ pub fn cast_shift_expr_rhs<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
     op: hir::BinOpKind,
     lhs: Bx::Value,
     rhs: Bx::Value,
-) -> Bx::Value {
-    cast_shift_rhs(bx, op, lhs, rhs)
-}
-
-fn cast_shift_rhs<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
-    bx: &mut Bx,
-    op: hir::BinOpKind,
-    lhs: Bx::Value,
-    rhs: Bx::Value,
 ) -> Bx::Value {
     // Shifts may have any size int on the rhs
     if op.is_shift() {