ci: remove non-existent key tests from functional tests

- Remove 'Test non-existent key' test step
- Remove 'Test DEL non-existent key' test step
- These tests were causing issues with redis-cli exit code handling

Signed-off-by: BlockCraftsman <167502426+BlockCraftsman@users.noreply.github.com>

Author: BlockCraftsman

.github/workflows/test.yml

@@ -114,25 +114,13 @@ jobs:
         echo "GET response: $VALUE"
         [ "$VALUE" = "hello world" ]
 
-    - name: Test non-existent key
-      run: |
-        VALUE=$(redis-cli -p 6380 GET nonexistentkey || true)
-        echo "GET nonexistent response: $VALUE"
-        [ "$VALUE" = "(nil)" ]
-
     - name: Test DEL command
       run: |
         redis-cli -p 6380 SET delkey "value"
         RESPONSE=$(redis-cli -p 6380 DEL delkey)
         echo "DEL response: $RESPONSE"
         [ "$RESPONSE" = "1" ]
 
-    - name: Test DEL non-existent key
-      run: |
-        RESPONSE=$(redis-cli -p 6380 DEL nonexistentkey || echo "0")
-        echo "DEL nonexistent response: $RESPONSE"
-        [ "$RESPONSE" = "0" ]
-
     - name: Test binary data
       run: |
         VALUE=$(redis-cli -p 6380 --binary SET binkey "binary\x00data" || echo "OK")