Cleanup debian/changelog file

Remove maintainer stanza for the now upstreamed CVE-2018-11506 (included
in 4.16.13) and remove maintainer trailer for the new upstream stable
update import.

debian/changelog

@@ -1,6 +1,5 @@
 linux (4.16.13-1) UNRELEASED; urgency=medium
 
-  [ Romain Perier ]
   * New upstream stable update:
     https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.16.13
     - [mips*] c-r4k: Fix data corruption related to cache coherence
@@ -28,7 +27,7 @@ linux (4.16.13-1) UNRELEASED; urgency=medium
     - [powerpc*] 64s: Clear PCR on boot
     - IB/hfi1: Use after free race condition in send context error path
     - IB/umem: Use the correct mm during ib_umem_release
-    - sr: pass down correctly sized SCSI sense buffer
+    - sr: pass down correctly sized SCSI sense buffer (CVE-2018-11506)
     - bcma: fix buffer size caused crash in bcma_core_mips_print_irq()
     - idr: fix invalid ptr dereference on item delete
     - Revert "ipc/shm: Fix shmat mmap nil-page protection"
@@ -281,9 +280,6 @@ linux (4.16.13-1) UNRELEASED; urgency=medium
     - kdb: make "mdr" command repeat
     - drm/vmwgfx: Set dmabuf_size when vmw_dmabuf_init is successful
 
-  [ Salvatore Bonaccorso ]
-  * sr: pass down correctly sized SCSI sense buffer (CVE-2018-11506)
-
   [ Vagrant Cascadian ]
   * [armhf] Enable MFD_AC100 and RTC_DRV_AC100, used in allwinner A80/A83t
     systems.