Remove S3 code that was obsolete in V3 for V4. (#3686)

The GetACL and PutACL obsoletes were left since they were only obsolete in V4.

Author: normj

generator/.DevConfigs/48136445-7021-4BDB-96AB-3F0C7B00368E.json

@@ -0,0 +1,21 @@
+{
+    "services": [
+        {
+            "serviceName": "S3",
+            "type": "patch",
+            "changeLogMessages": [
+				"Remove obsolete DisableMD5Stream property. Code should be updated to use DisableDefaultChecksumValidation property.",
+				"Remove obsolete ServerSideEncryptionMethod and ServerSideEncryptionKeyManagementServiceKeyId from CopyPart. This should be set in the InitiateMultipartUpload method.",
+				"Remove obsolete Expires property from GetObjectResponse. Code should be updated to use ExpiresString. Since the string may not be in a valid timestamp format code shoud use TryParse when converting to DateTime.",
+				"Remove obsolete region identifiers from S3Region enumeration",
+				"Remove obsolete Prefix property from LifecycleConfiguration. Code should be updated to use Filter property.",
+				"Remove obsolete Transition and NoncurrentVersionTransition from LifecycleRule. Could should be updated to use the collection versions Transitions and NoncurrentVersionTransitions.",
+				"Remove obsolete Event property from TopicConfiguration. Code should be updated to use the collection property Events.",
+				"Remove obsolete CalculateContentMD5Header property. This property no longer needed to be set because the SDK will compute a checksum by default.",
+				"Remove obsolete Bucket property from SelectObjectContentRequest. Code should be updated to use BucketName.",
+				"Remove obsolete NumberOfUploadThreads property from TransferUtilityConfig. Code should be updated to use ConcurrentServiceRequests.",
+				"Remove obsolete DoesS3BucketExist method. Code should be updated to use DoesS3BucketExistV2"
+            ]
+        }
+    ]
+}

sdk/src/Core/Amazon.Runtime/SharedInterfaces/_bcl/ICoreAmazonS3.cs

@@ -89,12 +89,5 @@ public partial interface ICoreAmazonS3
         /// </summary>
         /// <param name="bucketName"></param>
         void EnsureBucketExists(string bucketName);
-
-        /// <summary>
-        /// Check to see if the bucket exists.
-        /// </summary>
-        /// <param name="bucketName"></param>
-        /// <returns></returns>
-        bool DoesS3BucketExist(string bucketName);
     }
 }