resource/aws_ssm_document: Fixes for tfproviderlint R006

Reference: #11864

`RetryFunc` should only be used when logic has a retryable condition. In the case of working with the AWS Go SDK, it also arbitrarily restricts the automatic retrying logic of API calls to the timeout, which is generally undesired.

Previously:

```
aws/resource_aws_ssm_document.go:213:39: R006: RetryFunc should include RetryableError() handling or be removed
```

Output from acceptance testing:

```
--- PASS: TestAccAWSSSMDocument_basic (26.29s)
--- PASS: TestAccAWSSSMDocument_session (37.24s)
--- PASS: TestAccAWSSSMDocument_automation (41.32s)
--- PASS: TestAccAWSSSMDocument_permission_batching (44.07s)
--- PASS: TestAccAWSSSMDocument_params (46.96s)
--- PASS: TestAccAWSSSMDocument_SchemaVersion_1 (48.76s)
--- PASS: TestAccAWSSSMDocument_DocumentFormat_YAML (51.32s)
--- PASS: TestAccAWSSSMDocument_target_type (51.87s)
--- PASS: TestAccAWSSSMDocument_Tags (58.75s)
--- PASS: TestAccAWSSSMDocument_permission_private (66.11s)
--- PASS: TestAccAWSSSMDocument_permission_public (67.63s)
--- PASS: TestAccAWSSSMDocument_update (76.88s)
--- PASS: TestAccAWSSSMDocument_permission_change (77.82s)
--- PASS: TestAccAWSSSMDocument_package (83.33s)
```

aws/resource_aws_ssm_document.go

@@ -208,21 +208,8 @@ func resourceAwsSsmDocumentCreate(d *schema.ResourceData, meta interface{}) erro
 		docInput.TargetType = aws.String(v.(string))
 	}
 
-	log.Printf("[DEBUG] Waiting for SSM Document %q to be created", d.Get("name").(string))
-	var resp *ssm.CreateDocumentOutput
-	err := resource.Retry(5*time.Minute, func() *resource.RetryError {
-		var err error
-		resp, err = ssmconn.CreateDocument(docInput)
+	resp, err := ssmconn.CreateDocument(docInput)
 
-		if err != nil {
-			return resource.NonRetryableError(err)
-		}
-		return nil
-	})
-
-	if isResourceTimeoutError(err) {
-		resp, err = ssmconn.CreateDocument(docInput)
-	}
 	if err != nil {
 		return fmt.Errorf("Error creating SSM document: %s", err)
 	}