Get rid of namespace-sandbox filegroup.

It is not necessary as we can depend directly on
//src/main/tools:namespace-sandbox, like we do for dependencies in this
file.

--
Change-Id: I20d2c082603d280caf30b056ad103ec6f129ebde
Reviewed-on: https://bazel-review.googlesource.com/1310
MOS_MIGRATED_REVID=93711825

src/BUILD

diff --git a/src/BUILD b/src/BUILD
index 1677995..c192e2d 100644
--- a/src/BUILD
+++ b/src/BUILD
@@ -27,7 +27,7 @@
         ":libunix",
         "//src/main/tools:build-runfiles",
         "//src/main/tools:process-wrapper",
-        ":namespace-sandbox",
+        "//src/main/tools:namespace-sandbox",
         "client_info",
         "//src/main/tools:build_interface_so",
     ],
@@ -55,7 +55,7 @@
         "//src/main/tools:build-runfiles",
         "//src/main/tools:process-wrapper",
         "//src/main/tools:jdk-support",
-        ":namespace-sandbox",
+        "//src/main/tools:namespace-sandbox",
         "client_info",
         "//src/main/tools:build_interface_so",
         "install_base_key",
@@ -95,13 +95,6 @@
     ],
 )
 
-filegroup(
-    name = "namespace-sandbox",
-    srcs = [
-        "//src/main/tools:namespace-sandbox",
-    ],
-)
-
 config_setting(
     name = "darwin",
     values = {"cpu": "darwin"},