Remove some of our changes

[tkeemon]

These two changes:

• configuration/playbooks/roles/edxapp/defaults/main.yml

  Lines 18 to 21 in a41fb79

  	#stub for appsembler specific vals
  	EDXAPP_APPSEMBLER_FEATURES: {
  	TMP: None
  	}

• configuration/playbooks/roles/edxapp/defaults/main.yml

  Line 806 in a41fb79

  APPSEMBLER_FEATURES: "{{ EDXAPP_APPSEMBLER_FEATURES }}"

can be removed from our version of the fork if we do the following in each customer's server-vars.yml file:

---
EDXAPP_APPSEMBLER_FEATURES: 
  FEATURE_1: value
  FEATURE_2: value

EDXAPP_ENV_EXTRA:
  APPSEMBLER_FEATURES: "{{ EDXAPP_APPSEMBLER_FEATURES }}"

[natea]

@tkeemon agreed that let's try to remove as many customizations from the playbooks as possible, and encapsulate them in server-vars.yml so they're all in one place.

[OmarIthawi]

Thanks TJ for the note. It's 2021 but not too late to address this tech debt. My tentative plan is to remove APPSEMBLER_FEATURES['ENABLE_XYZ'] in favor of settings.FEATUES['TAHOE_ENABLE_XYZ'].