[U-Boot] [PATCH RESEND 6/6] doc: imx: habv4: Remove secure_boot.txt guide

[Breno Matheus Lima]

The secure_boot.txt guide was replaced by mx6_mx7_secure_boot.txt and
mx6_mx7_spl_secure_boot.txt documents.

Both documents covers all steps needed for SPL and non-SPL tagets,
so remove secure_boot.txt file to avoid duplicated content.

Signed-off-by: Breno Lima <breno.lima at nxp.com>
---
 doc/imx/habv4/secure_boot.txt | 100 ----------------------------------
 1 file changed, 100 deletions(-)
 delete mode 100644 doc/imx/habv4/secure_boot.txt

diff --git a/doc/imx/habv4/secure_boot.txt b/doc/imx/habv4/secure_boot.txt
deleted file mode 100644
index ae68dc8040..0000000000
-- 
2.17.1