Remove line that got into the wrong place

Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
diff --git a/docs/3.0-migration-guide.md b/docs/3.0-migration-guide.md
index bb21ded..513aba8 100644
--- a/docs/3.0-migration-guide.md
+++ b/docs/3.0-migration-guide.md
@@ -75,7 +75,6 @@
 and relied on that version in order to communicate with peers that are not up
 to date. If one of your peers is in that case, please try contacting them and
 encouraging them to upgrade their software.
-`0`.
 
 Strengthen default algorithm selection for X.509 and TLS
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