Bazel: Remove unused glob function

Buildifier ran in warn mode flagged unused glob function:

constant-glob: Glob pattern "ReceivePackRefCache.java" has no wildcard
('*'). Constant patterns can be error-prone, move the file outside the
glob.

Change-Id: If0fd632b145c8bf48b92095250e6f71b33a7df59
diff --git a/java/com/google/gerrit/server/git/receive/BUILD b/java/com/google/gerrit/server/git/receive/BUILD
index 7402a37..766a835 100644
--- a/java/com/google/gerrit/server/git/receive/BUILD
+++ b/java/com/google/gerrit/server/git/receive/BUILD
@@ -34,7 +34,7 @@
 
 java_library(
     name = "ref_cache",
-    srcs = glob(["ReceivePackRefCache.java"]),
+    srcs = ["ReceivePackRefCache.java"],
     visibility = ["//visibility:public"],
     deps = [
         "//java/com/google/gerrit/entities",