Doc change explicit flag (#336)

Additional minor cleanup of wording for EXPLICIT FLAG

Signed-off-by: PRADEEP BG <[email protected]>
Co-authored-by: Russell McGuire <[email protected]>

Author: pbg-intel

scripts/core/cmdqueue.yml

@@ -73,7 +73,7 @@ members:
       name: index
       desc: |
             [in] command queue index within the group;
-            must be zero if $X_COMMAND_QUEUE_FLAG_EXPLICIT_ONLY is not set. 
+            must be zero. 
     - type: $x_command_queue_flags_t
       name: flags
       desc: |