fuse: remove deprecated CAP_DIRECT_IO_RELAX

This is technically a backward incompatible change, but this feature
is currently not supported.

Change-Id: Ifcea9a337a06277f70a23eeee66db8d4b661b046

fuse/types.go

@@ -301,14 +301,14 @@ const (
 
 	/* bits 24..31 differ across linux and mac */
 	/* bits 32..63 get shifted down 32 bits into the Flags2 field */
-	CAP_SECURITY_CTX      = (1 << 32)
-	CAP_HAS_INODE_DAX     = (1 << 33)
-	CAP_CREATE_SUPP_GROUP = (1 << 34)
-	CAP_HAS_EXPIRE_ONLY   = (1 << 35)
-	CAP_DIRECT_IO_RELAX   = (1 << 36) // DIRECT_IO_ALLOW_MMAP ?
-	CAP_PASSTHROUGH       = (1 << 37)
-	CAP_NO_EXPORT_SUPPORT = (1 << 38)
-	CAP_HAS_RESEND        = (1 << 39)
+	CAP_SECURITY_CTX         = (1 << 32)
+	CAP_HAS_INODE_DAX        = (1 << 33)
+	CAP_CREATE_SUPP_GROUP    = (1 << 34)
+	CAP_HAS_EXPIRE_ONLY      = (1 << 35)
+	CAP_DIRECT_IO_ALLOW_MMAP = (1 << 36)
+	CAP_PASSTHROUGH          = (1 << 37)
+	CAP_NO_EXPORT_SUPPORT    = (1 << 38)
+	CAP_HAS_RESEND           = (1 << 39)
 )
 
 type InitIn struct {