minor #16338 [DependencyInjection] Update autowiring.rst (amine-betari)

This PR was submitted for the 5.3 branch but it was merged into the 5.4 branch instead.

Discussion
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[DependencyInjection] Update autowiring.rst

I removed this sentence because there is no obligation that the interface should be in the same file as the class
====> and that interface is also discovered in the same file

Commits
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f90b0a5 Update autowiring.rst

Author: javiereguiluz

service_container/autowiring.rst

@@ -371,8 +371,7 @@ dealing with the ``TransformerInterface``.
 .. tip::
 
     When using a `service definition prototype`_, if only one service is
-    discovered that implements an interface, and that interface is also
-    discovered in the same file, configuring the alias is not mandatory
+    discovered that implements an interface, configuring the alias is not mandatory
     and Symfony will automatically create one.
 
 Dealing with Multiple Implementations of the Same Type