3 files changed, 0 insertions, 25 deletions

diff --git a/docs/faq_build.md b/docs/faq_build.md
index b2e448306..618ae40f3 100644
--- a/docs/faq_build.md
+++ b/docs/faq_build.md
@@ -99,14 +99,6 @@ You can buy a really unique VID:PID here. I don't think you need this for person
 - http://www.obdev.at/products/vusb/license.html
 - http://www.mcselec.com/index.php?page=shop.product_details&flypage=shop.flypage&product_id=92&option=com_phpshop&Itemid=1
 
-## Cortex: `cstddef: No such file or directory`
-GCC 4.8 of Ubuntu 14.04 had this problem and had to update to 4.9 with this PPA.
-https://launchpad.net/~terry.guo/+archive/ubuntu/gcc-arm-embedded
-
-https://github.com/tmk/tmk_keyboard/issues/212
-https://github.com/tmk/tmk_keyboard/wiki/mbed-cortex-porting#compile-error-cstddef
-https://developer.mbed.org/forum/mbed/topic/5205/
-
 ## BOOTLOADER_SIZE for AVR
 Note that Teensy2.0++ bootloader size is 2048byte. Some Makefiles may have wrong comment.
 
diff --git a/docs/fr-fr/faq_build.md b/docs/fr-fr/faq_build.md
index 448ff01aa..84d88afcd 100644
--- a/docs/fr-fr/faq_build.md
+++ b/docs/fr-fr/faq_build.md
@@ -99,15 +99,6 @@ Vous pouvez acheter un VID:PID unique ici. Je ne pense pas que ce soit nécessai
 - http://www.obdev.at/products/vusb/license.html
 - http://www.mcselec.com/index.php?page=shop.product_details&flypage=shop.flypage&product_id=92&option=com_phpshop&Itemid=1
 
-## Cortex: `cstddef: No such file or directory`
-
-Ce problème existait avec le GCC 4.8 d'Ubuntu 14.04, la solution a nécessité de mettre à jour vers 4.9 avec ce PPA.
-https://launchpad.net/~terry.guo/+archive/ubuntu/gcc-arm-embedded
-
-https://github.com/tmk/tmk_keyboard/issues/212
-https://github.com/tmk/tmk_keyboard/wiki/mbed-cortex-porting#compile-error-cstddef
-https://developer.mbed.org/forum/mbed/topic/5205/
-
 ## BOOTLOADER_SIZE pour AVR
 
 Notez que la taille du bootloader pour les Teensy2.0++ est de 2048bytes. Quelques Makefiles peuvent contenir une erreur et avoir le mauvais commentaire.
diff --git a/docs/zh-cn/faq_build.md b/docs/zh-cn/faq_build.md
index 82d0697a8..0d9047bc5 100644
--- a/docs/zh-cn/faq_build.md
+++ b/docs/zh-cn/faq_build.md
@@ -68,14 +68,6 @@ https://github.com/tmk/tmk_keyboard/issues/150
 - http://www.obdev.at/products/vusb/license.html
 - http://www.mcselec.com/index.php?page=shop.product_details&flypage=shop.flypage&product_id=92&option=com_phpshop&Itemid=1
 
-## Cortex: `cstddef: No such file or directory`
-在Ubuntu 14.04上的GCC 4.8 会出现这种问题需要用这个PPA升级到4.9。
-https://launchpad.net/~terry.guo/+archive/ubuntu/gcc-arm-embedded
-
-https://github.com/tmk/tmk_keyboard/issues/212
-https://github.com/tmk/tmk_keyboard/wiki/mbed-cortex-porting#compile-error-cstddef
-https://developer.mbed.org/forum/mbed/topic/5205/
-
 ## AVR的BOOTLOADER_SIZE
 注意Teensy2.0++ bootloader的大小是2048字节。有些Makefile注释错了。