Make GKE the default in alpha and qa (#2624)

proxy/src/main/java/google/registry/proxy/ProxyConfig.java

@@ -41,7 +41,6 @@ public class ProxyConfig {
 
   public String projectId;
   public String oauthClientId;
-  public boolean canary;
   public List<String> gcpScopes;
   public int serverCertificateCacheSeconds;
   public Gcs gcs;

proxy/src/main/java/google/registry/proxy/ProxyModule.java

@@ -281,8 +281,8 @@ public class ProxyModule {
   @Singleton
   @Provides
   @Named("canary")
-  static boolean provideIsCanary(ProxyConfig config) {
-    return config.canary;
+  boolean provideIsCanary(Environment env) {
+    return env.name().endsWith("_CANARY");
   }
 
   @Singleton

proxy/src/main/java/google/registry/proxy/config/default-config.yaml

@@ -8,9 +8,6 @@
 # GCP project ID
 projectId: your-gcp-project-id
 
-# Whether to connect to the canary (instead of regular) service.
-canary: false
-
 # OAuth client ID set as the audience of the OIDC token. This value must be the
 # same as the auth.oauthClientId value in Nomulus config file, which usually is
 # the IAP client ID, to allow the request to access IAP protected endpoints.