make: unifdef for NSE (undefined)

@@ -606,14 +606,10 @@
         svr4_name = GETNAME(wcs_buffer, FIND_LENGTH);
         MBSTOWCS(wcs_buffer, NOCATGETS(".POSIX"));
         posix_name = GETNAME(wcs_buffer, FIND_LENGTH);
         MBSTOWCS(wcs_buffer, NOCATGETS(".DEFAULT"));
         default_rule_name = GETNAME(wcs_buffer, FIND_LENGTH);
-#ifdef NSE
-        MBSTOWCS(wcs_buffer, NOCATGETS(".DERIVED_SRC"));
-        derived_src= GETNAME(wcs_buffer, FIND_LENGTH);
-#endif
         MBSTOWCS(wcs_buffer, NOCATGETS("$"));
         dollar = GETNAME(wcs_buffer, FIND_LENGTH);
         MBSTOWCS(wcs_buffer, NOCATGETS(".DONE"));
         done = GETNAME(wcs_buffer, FIND_LENGTH);
         MBSTOWCS(wcs_buffer, NOCATGETS("."));

@@ -692,13 +688,10 @@
         /* Mark special targets so that the reader treats them properly */
         svr4_name->special_reader = svr4_special;
         posix_name->special_reader = posix_special;
         built_last_make_run->special_reader = built_last_make_run_special;
         default_rule_name->special_reader = default_special;
-#ifdef NSE
-        derived_src->special_reader= derived_src_special;
-#endif
         dot_keep_state->special_reader = keep_state_special;
         dot_keep_state_file->special_reader = keep_state_file_special;
         ignore_name->special_reader = ignore_special;
         make_version->special_reader = make_version_special;
         no_parallel_name->special_reader = no_parallel_special;