Update definition of deprecations

doc/development/deprecation_guidelines/index.md

@@ -14,8 +14,7 @@ changes to GitLab features.
 It's important to understand the difference between **deprecation** and
 **removal**:
 
-**Deprecation** is the process of flagging/marking/announcing that a feature
-is scheduled for removal in a future version of GitLab.
+**Deprecation** is the process of flagging/marking/announcing that a feature is no longer fully supported and may be removed in a future version of GitLab.
 
 **Removal** is the process of actually removing a feature that was previously
 deprecated.