diff --git a/cmd/gateway-gcs-errors.go b/cmd/gateway-gcs-errors.go
index 5efa6eb88..a4cb06b89 100644
--- a/cmd/gateway-gcs-errors.go
+++ b/cmd/gateway-gcs-errors.go
@@ -24,7 +24,4 @@ var (
 
 	// Project ID not found
 	errGCSProjectIDNotFound = errors.New("unknown project id")
-
-	// Multipart identifier is not in the correct form.
-	errGCSNotValidMultipartIdentifier = errors.New("Not a valid multipart identifier")
 )
diff --git a/cmd/signature-v4.go b/cmd/signature-v4.go
index f71e17e36..dec9340a9 100644
--- a/cmd/signature-v4.go
+++ b/cmd/signature-v4.go
@@ -39,10 +39,9 @@ import (
 
 // AWS Signature Version '4' constants.
 const (
-	signV4Algorithm     = "AWS4-HMAC-SHA256"
-	iso8601Format       = "20060102T150405Z"
-	yyyymmdd            = "20060102"
-	presignedHostHeader = "host"
+	signV4Algorithm = "AWS4-HMAC-SHA256"
+	iso8601Format   = "20060102T150405Z"
+	yyyymmdd        = "20060102"
 )
 
 // getCanonicalHeaders generate a list of request headers with their values
diff --git a/cmd/storage-errors.go b/cmd/storage-errors.go
index f142701c0..0148985e2 100644
--- a/cmd/storage-errors.go
+++ b/cmd/storage-errors.go
@@ -55,9 +55,6 @@ var errFileNotFound = errors.New("file not found")
 // errFileNameTooLong - given file name is too long than supported length.
 var errFileNameTooLong = errors.New("file name too long")
 
-// errFileComponentInvalid - given file name has invalid components.
-var errFileComponentInvalid = errors.New("file name has invalid components")
-
 // errVolumeExists - cannot create same volume again.
 var errVolumeExists = errors.New("volume already exists")
 
diff --git a/cmd/xl-v1-errors.go b/cmd/xl-v1-errors.go
index faa03e92f..b8014d115 100644
--- a/cmd/xl-v1-errors.go
+++ b/cmd/xl-v1-errors.go
@@ -18,15 +18,6 @@ package cmd
 
 import "errors"
 
-// errXLMaxDisks - returned for reached maximum of disks.
-var errXLMaxDisks = errors.New("Number of disks are higher than supported maximum count '16'")
-
-// errXLMinDisks - returned for minimum number of disks.
-var errXLMinDisks = errors.New("Minimum '4' disks are required to enable erasure code")
-
-// errXLNumDisks - returned for odd number of disks.
-var errXLNumDisks = errors.New("Total number of disks should be multiples of '2'")
-
 // errXLReadQuorum - did not meet read quorum.
 var errXLReadQuorum = errors.New("Read failed. Insufficient number of disks online")