make: unifdef for NSE (undefined)

*** 332,344 ****
   */
  typedef enum {
          no_special,
          built_last_make_run_special,
          default_special,
- #ifdef NSE
-         derived_src_special,
- #endif
          get_posix_special,
          get_special,
          ignore_special,
          keep_state_file_special,
          keep_state_special,
--- 332,341 ----
*** 416,428 ****
          /*
          * For "ABC = xyz" constructs
          * Name "ABC" get one macro prop
          */
          struct _Name            *value;
- #ifdef NSE
-         Boolean                 imported:1;
- #endif
          Boolean                 exported:1;
          Boolean                 read_only:1;
          /*
          * This macro is defined conditionally
          */
--- 413,422 ----
*** 460,472 ****
                  mode_t                  mode;           /* Of file */
                  Boolean                 is_file:1;
                  Boolean                 is_dir:1;
                  Boolean                 is_sym_link:1;
                  Boolean                 is_precious:1;
- #ifdef NSE
-                 Boolean                 is_derived_src:1;
- #endif
                  enum sccs_stat          has_sccs:2;
          }                       stat;
          /*
           * Count instances of :: definitions for this target
           */
--- 454,463 ----