LemonLDAP::NG: Remove getBearerSignature() override

Bearer Authorization Tokens appear to be supported by v2.0:
https://lemonldap-ng.org/documentation/2.0/oauth2handler.

Change-Id: I58d55d9e00f7881ad7143214d929df0327268011

src/main/java/com/googlesource/gerrit/plugins/oauth/LemonLDAPApi.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/oauth/LemonLDAPApi.java b/src/main/java/com/googlesource/gerrit/plugins/oauth/LemonLDAPApi.java
index 7b66c25..55ebf38 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/oauth/LemonLDAPApi.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/oauth/LemonLDAPApi.java
@@ -15,8 +15,6 @@
 package com.googlesource.gerrit.plugins.oauth;
 
 import com.github.scribejava.core.builder.api.DefaultApi20;
-import com.github.scribejava.core.oauth2.bearersignature.BearerSignature;
-import com.github.scribejava.core.oauth2.bearersignature.BearerSignatureURIQueryParameter;
 import com.github.scribejava.core.oauth2.clientauthentication.ClientAuthentication;
 import com.github.scribejava.core.oauth2.clientauthentication.RequestBodyAuthenticationScheme;
 
@@ -45,11 +43,4 @@
   public ClientAuthentication getClientAuthentication() {
     return RequestBodyAuthenticationScheme.instance();
   }
-
-  // TODO(davido): Remove this override, if BearerSignatureAuthorization
-  // request header field is supported.
-  @Override
-  public BearerSignature getBearerSignature() {
-    return BearerSignatureURIQueryParameter.instance();
-  }
 }