[OCaml] Remove test with invalid usage of #dbg_declare

add a #dbg_declare to an i32 argument. The change introduced in ecd4c08
caught this incorrect usage of #dbg_declare in the OCaml tests.

Author: alan-j-hu

llvm/test/Bindings/OCaml/debuginfo.ml

@@ -290,18 +290,6 @@ let test_variables f dibuilder file_di fun_di =
   let () = Printf.printf "%s\n" (Llvm.string_of_lldbgrecord vdi) in
   (* CHECK: dbg_declare(ptr %my_alloca, ![[#]], !DIExpression(), ![[#]])
   *)
-  let arg0 = (Llvm.params f).(0) in
-  let arg_var = Llvm_debuginfo.dibuild_create_parameter_variable dibuilder ~scope:fun_di
-    ~name:"my_arg" ~argno:1 ~file:file_di ~line:10 ~ty
-    ~always_preserve:false flags_zero
-  in
-  let argdi = Llvm_debuginfo.dibuild_insert_declare_before dibuilder ~storage:arg0
-    ~var_info:arg_var ~expr:(Llvm_debuginfo.dibuild_expression dibuilder [||])
-    ~location ~instr:entry_term
-  in
-  let () = Printf.printf "%s\n" (Llvm.string_of_lldbgrecord argdi) in
-  (* CHECK: dbg_declare(i32 %0, ![[#]], !DIExpression(), ![[#]])
-  *)
   ()
 
 let test_types dibuilder file_di m_di =