Revert "Add "thanks" and "thank you" to "pray" emoji (#24090)" (#24969)

This reverts commit 6abaf04a95.

webapp/channels/src/selectors/emojis.test.js

@@ -73,6 +73,7 @@ describe('getRecentEmojisData', () => {
             {name: 'flag-au', usageCount: 1},
             {name: 'kappa', usageCount: 1},
             {name: 'gitlab', usageCount: 1},
+            {name: 'thanks', usageCount: 1},
         ];
         const state = mergeObjects(baseState, {
             entities: {
@@ -98,7 +99,7 @@ describe('getRecentEmojisData', () => {
             {name: 'flag-au', usageCount: 1},
             {name: 'kappa', usageCount: 1},
             {name: 'gitlab', usageCount: 1},
-            {name: 'smile', usageCount: 1},
+            {name: 'thanks', usageCount: 1},
         ];
         const state = mergeObjects(baseState, {
             entities: {