Remove temporary constraints.

This should no longer be necessary now that we have found a root cause
fix for the issue. This was removed because it was causing the case
of celery tasks not getting registered to happen more often.

Undoing https://github.com/edx/edx-platform/pull/25787

Actual Fixes:
- https://github.com/edx/edx-platform/pull/25822
- https://github.com/edx/edx-platform/pull/25825

requirements/constraints.txt

@@ -23,10 +23,6 @@ django-countries==5.5
 # Removes deprecated get_ip function, which we still use (ARCHBOM-1329 for unpinning)
 django-ipware<3.0.0
 
-# Pinning as a temporary fix to https://openedx.atlassian.net/browse/CR-2982, as per
-# https://github.com/edx/edx-platform/pull/25766
-django-model-utils==4.1.0
-
 # 2.0.0 dropped support for Python 3.5
 django-pipeline<2.0.0
 
@@ -41,10 +37,6 @@ drf-yasg<1.17.1
 # for them.
 edx-enterprise==3.13.11
 
-# Pinning as a temporary fix to https://openedx.atlassian.net/browse/CR-2982, as per
-# https://github.com/edx/edx-platform/pull/25766
-edx-submissions==3.2.2
-
 # We expect v2.0.0 to introduce large breaking changes in the feature toggle API
 edx-toggles<2.0.0
 
@@ -75,10 +67,6 @@ jsonfield2<3.1.0
 # kiwisolver 1.2.0 requires Python 3.6+
 kiwisolver<1.2.0
 
-# Pinning as a temporary fix to https://openedx.atlassian.net/browse/CR-2982, as per
-# https://github.com/edx/edx-platform/pull/25766
-lti-consumer-xblock==2.3
-
 # 4.5.1 introduced a bug when used together with xmlsec: https://bugs.launchpad.net/lxml/+bug/1880251
 # Tests passed, but hit a problem in stage
 lxml<4.5.1
@@ -101,10 +89,6 @@ oauthlib==3.0.1
 # django-auth-toolkit==1.3.3 requires oauthlib>=3.1.0 which is pinned because of test failures
 django-oauth-toolkit<=1.3.2
 
-# Pinning as a temporary fix to https://openedx.atlassian.net/browse/CR-2982, as per
-# https://github.com/edx/edx-platform/pull/25766
-ora2==2.12.1
-
 # path 13.2.0 drops support for Python 3.5
 path<13.2.0