Remove incorrect text in P4runtime-spec.

Signed-off-by: Matthew Lam <[email protected]>

docs/v1/P4Runtime-Spec.mdk

@@ -4569,7 +4569,7 @@ semantics.
   return `INVALID_ARGUMENT`. The `metadata` field is an arbitrary `bytes` value
   which is opaque to the target. There is no requirement of where this is
   stored, but it must be returned by the server along with the rest of the entry
-  when the client performs a read on the entry. The `fallback_ports` field.
+  when the client performs a read on the entry.
 * `MODIFY`: Modify the set of replicas and metadata for a given multicast group
   entry, indexed by the given `multicast_group_id`. Same restrictions as
   `INSERT` apply here.
@@ -4680,7 +4680,6 @@ semantics:
   service for each clone packet instance will be set to the value programmed in
   the clone session entry (`class_of_service` field). This value must be a valid
   value for the PSA `ClassOfService_t` type, which supports runtime translation
-  by default [@PSATranslation], or the server must return
   `INVALID_ARGUMENT`. See [PSA Metadata
   Translation](#sec-translation-of-port-numbers) for more information. The
   `packet_length_bytes` field must be set to a non-zero value if the clone