Remove unused variables from wrappers.

src/mtime_c_bindings.f90

@@ -804,7 +804,6 @@ contains
     integer, intent(IN) :: lineno
 
     character(LEN=*), intent(IN) :: routine_str
-    character(len=max_mtime_error_str_len)     :: error_str
     if (lcond)  call handle_errno_base(errno, routine_str, lineno)
   end subroutine handle_errno_cond
 

src/mtime_t_datetime.inc

@@ -9,7 +9,6 @@
     CHARACTER(len=*), INTENT(in) :: dt_string
     TYPE(c_ptr)             :: c_pointer
     TYPE(datetime), POINTER :: dt_tmp
-    INTEGER :: errno
     c_pointer = my_newdatetime(TRIM(ADJUSTL(dt_string))//c_null_char)
     CALL handle_errno(.NOT. c_ASSOCIATED(c_pointer), 4 *100 + 1, &
       & __FILE__, &