rust/clippy: fix lint: redundant_pattern_matching

rust/src/lib.rs

@@ -35,7 +35,6 @@
 #![allow(clippy::match_like_matches_macro)]
 #![allow(clippy::module_inception)]
 #![allow(clippy::new_without_default)]
-#![allow(clippy::redundant_pattern_matching)]
 #![allow(clippy::result_unit_err)]
 #![allow(clippy::type_complexity)]
 #![allow(clippy::upper_case_acronyms)]

rust/src/nfs/nfs3.rs

@@ -167,10 +167,7 @@ impl NFSState {
 
         } else if r.procedure == NFSPROC3_READ {
 
-            let found = match self.get_file_tx_by_handle(&xidmap.file_handle, Direction::ToClient) {
+            let found = self.get_file_tx_by_handle(&xidmap.file_handle, Direction::ToClient).is_some();
-                Some(_) => true,
-                None => false,
-            };
             if !found {
                 let tx = self.new_file_tx(&xidmap.file_handle, &xidmap.file_name, Direction::ToClient);
                 tx.procedure = NFSPROC3_READ;