Add nopython (#1319)

* Add nopython

* Can we drop wfsim, maybe yes

* Remove numba decorator

The decorator cannot do anything.

* Remove numba import

---------

Co-authored-by: Dacheng Xu <dx2227@columbia.edu>

straxen/plugins/led_cal/led_calibration.py

@@ -7,7 +7,6 @@
 from immutabledict import immutabledict
 import strax
 import straxen
-import numba
 import numpy as np
 
 # This makes sure shorthands for only the necessary functions
@@ -228,7 +227,6 @@ def pulse_dtype():
         return pulse_dtype
 
     @staticmethod
-    @numba.jit
     def calc_delta_time(ext_timings_nv_delta_time, pulses, hitlets_nv, nv_pmt_start, nv_pmt_stop):
         """Numpy access with fancy index returns copy, not view This for-loop is required to
         substitute in one by one."""