Removed TREx ASI due to an OpenCV

bug that crashes the trex_imager_readfile. There is an unaproved PR that
should fix it: opencv/opencv#23350.

I created a "trex_backup" branch to save the trex_nir code.

Author: mshumko

asilib/__init__.py

@@ -46,4 +46,3 @@
 from asilib.conjunction import Conjunction
 from asilib.asi.themis import themis, themis_info, themis_skymap
 from asilib.asi.rego import rego, rego_info, rego_skymap
-from asilib.asi.trex import trex_nir, trex_nir_info, trex_nir_skymap

asilib/asi/trex.py

@@ -4,7 +4,7 @@ Contribute
 We added the following guidance if you'd like to contribute to asilib.
 
 Installation
------------
+------------
 
 To standardize the development packages, run the following commands to reproduce the development environment locally: