Remove @service from InjectExtension as not required

I think it is clearer if @service is not here as it isn't
used or required.

Author: rbygrave

inject/pom.xml

@@ -43,13 +43,6 @@
       <optional>true</optional>
     </dependency>
 
-    <dependency>
-      <groupId>io.avaje</groupId>
-      <artifactId>avaje-spi-service</artifactId>
-      <version>1.11</version>
-      <optional>true</optional>
-    </dependency>
-
     <dependency>
       <groupId>org.mockito</groupId>
       <artifactId>mockito-core</artifactId>

inject/src/main/java/io/avaje/inject/spi/InjectExtension.java

@@ -1,7 +1,4 @@
 package io.avaje.inject.spi;
 
-import io.avaje.spi.Service;
-
 /** Superclass for all Inject SPI classes */
-@Service
 public interface InjectExtension {}

inject/src/main/java/module-info.java

@@ -8,7 +8,6 @@
   requires transitive jakarta.inject;
   requires static io.avaje.config;
   requires static org.mockito;
-  requires static io.avaje.spi;
 
   uses io.avaje.inject.spi.InjectExtension;
   uses io.avaje.inject.spi.Module;