I have Ubuntu installed along with Arch. I re-installed Arch a few times already. Now it works well. Once when I was re-installing Arch during boot when I chose the Choose temporary boot devise option at BIOS and I saw a new menu item (among Hdd, Usb, Dvd) appeared being arch_grub. I ran boot-repair utility later but this menu item is still there. How do I get rid of it?$ sudo fdisk -l[sudo] password for alex: Disk /dev/sda: 1000.2 GB, 1000204886016 bytes255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectorsUnits = sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 4096 bytesI/O size (minimum/optimal): 4096 bytes / 4096 bytesDisk identifier: 0x000a1bc4   Device Boot      Start         End      Blocks   Id  System/dev/sda1          526336   382824447   191149056   83  Linux/dev/sda2            2048      526335      262144    b  W95 FAT32/dev/sda3       382826494  1953523711   785348609    5  ExtendedPartition 3 does not start on physical sector boundary./dev/sda5      1946028032  1953523711     3747840   82  Linux swap / Solaris/dev/sda6   *   382834688  1946025983   781595648   83  LinuxPartition table entries are not in disk orderand $ lsblkNAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTsda      8:0    0 931.5G  0 disk sda1   8:1    0 182.3G  0 part /media/alex/archsda2   8:2    0   256M  0 part /media/alex/arch_bootsda3   8:3    0     1K  0 part sda5   8:5    0   3.6G  0 part [SWAP]sda6   8:6    0 745.4G  0 part /sr0     11:0    1  1024M  0 rom 
New menu item called arch_grub emerged as a temporary boot device
boot;dual boot;grub