Derive RDAP link paths from the received query

The former method -- a config string -- was cumbersome, as each Nomulus system would have to configure the link base to its own URL.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=173567021

java/google/registry/config/RegistryConfig.java

@@ -761,17 +761,6 @@ public final class RegistryConfig {
       return 100;
     }
 
-    /**
-     * Base for RDAP link paths.
-     *
-     * @see google.registry.rdap.RdapActionBase
-     */
-    @Provides
-    @Config("rdapLinkBase")
-    public static String provideRdapLinkBase(RegistryConfigSettings config) {
-      return config.rdap.baseUrl;
-    }
-
     /**
      * WHOIS server displayed in RDAP query responses. As per Gustavo Lozano of ICANN, this should
      * be omitted, but the ICANN operational profile doesn't actually say that, so it's good to have