(cleanup): Update Owner Alias - remove inactive maintainers

Removed maintainers from the Owner Alias who are no longer active in the project, in accordance with the [Contributor Ladder guidelines on inactive members](https://github.com/operator-framework/community/blob/master/contributor-ladder.md#inactive-members). They are invited to self-select emeritus status as outlined in the community process.

Author: camilamacedo86

OWNERS

@@ -1,32 +1,24 @@
 # approval == this is a good idea /approve
 approvers:
-  - awgreene
-  - dinhxuanvu
   - grokspawn
   - joelanford
   - kevinrizza
-  - njhale
   - oceanc80
   - perdasilva
 # review == this code is good /lgtm
 reviewers:
   - anik120
   - ankitathomas
-  - awgreene
-  - benluddy
-  - dinhxuanvu
   - everettraven
   - exdx
   - gallettilance
   - grokspawn
-  - jmrodri
   - joelanford
   - kevinrizza
-  - njhale
   - oceanc80
   - perdasilva
   - rashmigottipati
-  - theishshah
-  - varshaprasad96
+
+
 # Bugzilla component
 component: "OLM"