Remove extra new lines

Remove extra new lines
diff --git a/ChangeLog b/ChangeLog
index a02f6df..38e536d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -15,10 +15,8 @@
    * Add guard to validate that out_left can not be negative. Raised by 
      samoconnor in #1245.
 
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 = mbed TLS 2.1.10 branch released 2018-02-03
 
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 Security
    * Fix a heap corruption issue in the implementation of the truncated HMAC
      extension. When the truncated HMAC extension is enabled and CBC is used,