Remove readonly for now, to be consistent

Author: OskarStark

components/clock.rst

@@ -50,7 +50,7 @@ determine the current time::
     class ExpirationChecker
     {
         public function __construct(
-            private readonly ClockInterface $clock
+            private ClockInterface $clock
         ) {}
 
         public function isExpired(DateTimeInterface $validUntil): bool

quick_tour/the_architecture.rst

@@ -137,7 +137,7 @@ difference is that it's done in the constructor:
       class GreetingGenerator
       {
     +     public function __construct(
-    +         private readonly LoggerInterface $logger,
+    +         private LoggerInterface $logger,
     +     ) {
     +     }
 
@@ -171,7 +171,7 @@ that extends ``AbstractExtension``::
     class GreetExtension extends AbstractExtension
     {
         public function __construct(
-            private readonly GreetingGenerator $greetingGenerator,
+            private GreetingGenerator $greetingGenerator,
         ) {
         }