Merge pull request #18587 from OmarShehata/quaternion-gimbal-lock

Fix gimbal lock misconception in quaternion doc

docs/api/en/math/Quaternion.html

@@ -12,10 +12,7 @@
 
 		<p class="desc">
 			Implementation of a [link:http://en.wikipedia.org/wiki/Quaternion quaternion].
-			This is used for [link:https://en.wikipedia.org/wiki/Quaternions_and_spatial_rotation rotating things]
-			without encountering the dreaded
-			[link:http://en.wikipedia.org/wiki/Gimbal_lock gimbal lock] issue, amongst other
-			advantages.
+			This is used for [link:https://en.wikipedia.org/wiki/Quaternions_and_spatial_rotation rotating things].
 		</p>
 
 

docs/api/zh/math/Quaternion.html

@@ -12,10 +12,7 @@
 
 		<p class="desc">
 			Implementation of a [link:http://en.wikipedia.org/wiki/Quaternion quaternion].
-			This is used for [link:https://en.wikipedia.org/wiki/Quaternions_and_spatial_rotation rotating things]
-			without encountering the dreaded
-			[link:http://en.wikipedia.org/wiki/Gimbal_lock gimbal lock] issue, amongst other
-			advantages.
+			This is used for [link:https://en.wikipedia.org/wiki/Quaternions_and_spatial_rotation rotating things].
 		</p>