stashing

Changes so far:
- removed endpoint FirstAssemblyview
- moved the functionality to template_protein field in
TargetSerializer
- removed TargetMoleculesserializer
- removed sequences field from TargetSerializer

This is a result of Boris' comment in
github (m2ms/fragalysis-frontend#1373 (comment))
where he said the field isn't used and template_protein field is not
used. Looking at the code where this may be used, revealed that
Targetmoleculesserializer can be removed as well

NB! they're not removed-removed right now, only commented in. This
commit can be used to restore the code.

api/urls.py

@@ -88,9 +88,9 @@
     viewer_views.SessionProjectTagView,
     basename='session_project_tag',
 )
-router.register(
-    "target_molecules", viewer_views.TargetMoleculesView, basename='target_molecules'
-)
+# router.register(
+#     "target_molecules", viewer_views.TargetMoleculesView, basename='target_molecules'
+# )
 
 # Download a zip file of the requested contents
 router.register(
@@ -133,9 +133,9 @@
 router.register("job_callback", viewer_views.JobCallBackView, basename='job_callback')
 router.register("job_config", viewer_views.JobConfigView, basename='job_config')
 router.register("job_override", viewer_views.JobOverrideView, basename='job_override')
-router.register(
-    "first_assembly", viewer_views.FirstAssemblyView, basename='first_assembly'
-)
+# router.register(
+#     "first_assembly", viewer_views.FirstAssemblyView, basename='first_assembly'
+# )
 
 
 from rest_framework import response, schemas