api_server: Fix SPDX license expressions

These files appear to have leftover artifacts from a text editor in
their licenses which makes them invalid SPDX expressions.  Delete
them to be consistent with every other license line in the repo.

Signed-off-by: David Michael <[email protected]>

Author: dm0-

src/firecracker/src/api_server/request/drive.rs

@@ -1,5 +1,5 @@
 // Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0<Paste>
+// SPDX-License-Identifier: Apache-2.0
 
 use vmm::logger::{IncMetric, METRICS};
 use vmm::rpc_interface::VmmAction;

src/firecracker/src/api_server/request/machine_configuration.rs

@@ -1,5 +1,5 @@
 // Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
-// SPDX-License-Identifier: Apache-2.0<Paste>
+// SPDX-License-Identifier: Apache-2.0
 
 use vmm::logger::{IncMetric, METRICS};
 use vmm::rpc_interface::VmmAction;