Chore:Resolved java Util NoSuchElementException (#7730)

* Chore:Resolved java Util NoSuchElementException

Signed-off-by: Preeti <35308865+pr9t@users.noreply.github.com>

* formatting

Signed-off-by: Sally MacFarlane <macfarla.github@gmail.com>

---------

Signed-off-by: Preeti <35308865+pr9t@users.noreply.github.com>
Signed-off-by: Sally MacFarlane <macfarla.github@gmail.com>
Co-authored-by: Sally MacFarlane <macfarla.github@gmail.com>

ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockReceipts.java

@@ -95,7 +95,8 @@ public class EthGetBlockReceipts extends AbstractBlockParameterOrBlockHashMethod
             .map(
                 block ->
                     block.getTransactions().stream()
-                        .map(tx -> txReceipt(tx).get())
+                        .map(this::txReceipt)
+                        .flatMap(Optional::stream)
                         .collect(Collectors.toList()))
             .orElse(new ArrayList<>());