Bazel: Fix more buildifier warnings

This fixes buildifier warnings that were not fixed in automatic
mode:

  $ find . \( -name BUILD -o -name "*.bzl" \) -print \
      | xargs buildifier --lint=warn

* Remove unused variables
* Pattern `src/test/java/com/google/gerrit/server/project/Util.java`
  has no wildcard ('*')
* All calls to rules or macros should pass arguments by keyword
  (arg_name=value) syntax
* ctx.new_file is deprecated, used ctx.actions.declare_file instead

Change-Id: I1f8a04e8d576ab637ba8a46118720218ec486fff

gerrit-extension-api/BUILD

@@ -6,8 +6,6 @@ load("//tools/bzl:junit.bzl", "junit_tests")
 
 SRC = "src/main/java/com/google/gerrit/extensions/"
 
-SRCS = glob([SRC + "**/*.java"])
-
 EXT_API_SRCS = glob([SRC + "client/*.java"])
 
 gwt_module(

gerrit-gwtui/BUILD

@@ -9,7 +9,7 @@ load("//tools/bzl:license.bzl", "license_test")
 
 gwt_genrule()
 
-gwt_genrule("_r")
+gwt_genrule(suffix = "_r")
 
 gen_ui_module(name = "ui_module")
 

gerrit-plugin-api/BUILD

@@ -1,11 +1,5 @@
 load("//tools/bzl:javadoc.bzl", "java_doc")
 
-SRCS = [
-    "gerrit-server/src/main/java/",
-    "gerrit-httpd/src/main/java/",
-    "gerrit-sshd/src/main/java/",
-]
-
 PLUGIN_API = [
     "//gerrit-httpd:httpd",
     "//gerrit-pgm:init-api",

gerrit-server/BUILD

@@ -113,8 +113,9 @@ TESTUTIL_DEPS = [
 
 TESTUTIL = glob([
     "src/test/java/com/google/gerrit/testutil/**/*.java",
+]) + [
     "src/test/java/com/google/gerrit/server/project/Util.java",
-])
+]
 
 java_library(
     name = "testutil",

tools/bzl/js.bzl

@@ -307,10 +307,8 @@ Outputs:
 
 def _vulcanize_impl(ctx):
     # intermediate artifact.
-    vulcanized = ctx.new_file(
-        ctx.configuration.genfiles_dir,
-        ctx.outputs.html,
-        ".vulcanized.html",
+    vulcanized = ctx.actions.declare_file(
+        ctx.outputs.html.path + ".vulcanized.html",
     )
     destdir = ctx.outputs.html.path + ".dir"
     zips = [z for d in ctx.attr.deps for z in d.transitive_zipfiles]