Remove object file in finally

Signed-off-by: Bence Szépkúti <bence.szepkuti@arm.com>
diff --git a/scripts/mbedtls_dev/c_build_helper.py b/scripts/mbedtls_dev/c_build_helper.py
index 54c4e93..833db46 100644
--- a/scripts/mbedtls_dev/c_build_helper.py
+++ b/scripts/mbedtls_dev/c_build_helper.py
@@ -158,9 +158,8 @@
                              .format(caller, c_name))
         else:
             os.remove(c_name)
-        if _cc_is_msvc:
-            os.remove(obj_name)
         output = subprocess.check_output([exe_name])
         return output.decode('ascii').strip().split('\n')
     finally:
         remove_file_if_exists(exe_name)
+        remove_file_if_exists(obj_name)