Update 10.md

Author: gammasoft71

docs/documentation/tips_and_tricks/10.md

@@ -296,5 +296,4 @@ namespace system_tests {
 
 * [xtd.tunit reference](https://gammasoft71.github.io/xtd/reference_guides/latest/group__xtd__tunit.html)
 * [Tips & Tricks](/docs/documentation/tips_and_tricks)
-* [Tips & Tricks](/docs/documentation/tips_and_tricks)
 * [Documentation](/docs/documentation)