chore(go): cleanup files generated by examples (#806)

Author: rishav-karanjit

AwsEncryptionSDK/runtimes/go/examples/main.go

@@ -165,4 +165,7 @@ func main() {
 		utils.GenerateUUIDTestData(numOfString),
 		utils.DefaultKMSKeyId(),
 		utils.DefaultKmsKeyRegion())
+
+	// cleanup
+	utils.CleanUpFiles()
 }

AwsEncryptionSDK/runtimes/go/examples/utils/exampleUtils.go

@@ -53,6 +53,14 @@ twIDAQAB
 	testKmsEcdhKeyIdP256RecipientKeyId = "arn:aws:kms:us-west-2:370957321024:key/0265c8e9-5b6a-4055-8f70-63719e09fda5"
 )
 
+var filesCreatedByExamples = []string{
+	eccPrivateKeyFileNameSender,
+	eccPrivateKeyFileNameRecipient,
+	eccPublicKeyFileNameRecipient,
+	kmsEccPublicKeyFileNameRecipient,
+	kmsEccPublicKeyFileNameSender,
+}
+
 // Getter functions
 
 func KmsEcdhKeyIdP256SenderKeyId() string {
@@ -157,6 +165,12 @@ func KeyStoreName() string {
 
 // Utility functions
 
+func CleanUpFiles() {
+	for _, file := range filesCreatedByExamples {
+		os.Remove(file)
+	}
+}
+
 func WriteRawEcdhEccKeys(ecdhCurveSpec awscryptographyprimitivessmithygeneratedtypes.ECDHCurveSpec) error {
 	// Safety check: Validate neither file is present
 	if FileExists(eccPrivateKeyFileNameSender) ||