[ci skip] Remove /tests/tests/ from .gitignore

It got there by accident
diff --git a/.gitignore b/.gitignore
index 97f1d31..5982f9b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -25,4 +25,3 @@
 *.stTheme.cache
 *.sublime-workspace
 *.sublime-project
-/tests/tests/
\ No newline at end of file