Remove dead Config.arc_mode

Reviewed By: martintrojer

Differential Revision: D9751048

fbshipit-source-id: 41b9c00c6

infer/src/base/Config.ml

@@ -3022,9 +3022,6 @@ let set_reference_and_call_function reference value f x =
     ~finally:restore
 
 
-(** Current Objective-C Automatic Reference Counting (ARC) mode *)
-let arc_mode = ref false
-
 (** Flag for footprint discovery mode *)
 let footprint = ref true
 

infer/src/base/Config.mli

@@ -670,8 +670,6 @@ val xcpretty : bool
 
 (** {2 Global variables} *)
 
-val arc_mode : bool ref
-
 val footprint : bool ref
 
 val run_in_footprint_mode : ('a -> 'b) -> 'a -> 'b

infer/src/clang/Capture.ml

@@ -60,7 +60,6 @@ let run_clang_frontend ast_source =
   let trans_unit_ctx =
     match ast_decl with
     | Clang_ast_t.TranslationUnitDecl (_, _, _, info) ->
-        Config.arc_mode := info.Clang_ast_t.tudi_arc_enabled ;
         let source_file = SourceFile.from_abs_path info.Clang_ast_t.tudi_input_path in
         init_global_state_for_capture_and_linters source_file ;
         let lang =