x86: remove offsets.h from .gitignore and dontdiff

Commit 77d1a4999502c260df0eb2de437d320bf8c64b36 ("x86, boot: make
symbols from the main vmlinux available") removed all traces of
offsets.h from the tree. Remove its entries in dontdiff and x86/boot's
.gitignore file too.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/Documentation/dontdiff b/Documentation/dontdiff
index 74c25c8..b89a739 100644
--- a/Documentation/dontdiff
+++ b/Documentation/dontdiff
@@ -181,7 +181,6 @@
 nconf
 ncscope.*
 offset.h
-offsets.h
 oui.c*
 page-types
 parse.c
diff --git a/arch/x86/boot/.gitignore b/arch/x86/boot/.gitignore
index 851fe93..e3cf9f6 100644
--- a/arch/x86/boot/.gitignore
+++ b/arch/x86/boot/.gitignore
@@ -2,7 +2,6 @@
 bzImage
 cpustr.h
 mkcpustr
-offsets.h
 voffset.h
 zoffset.h
 setup