Update sqlite license to unencumbered.

SQLite is public domain.

Author: gunan

tensorflow/tools/lib_package/BUILD

@@ -105,7 +105,6 @@ genrule(
         "@png_archive//:LICENSE",
         "@protobuf_archive//:LICENSE",
         "@snappy//:COPYING",
-        "@sqlite_archive//:LICENSE",
         "@zlib_archive//:zlib.h",
     ] + if_mkl([
         "//third_party/mkl:LICENSE",
@@ -141,7 +140,6 @@ genrule(
         "@png_archive//:LICENSE",
         "@protobuf_archive//:LICENSE",
         "@snappy//:COPYING",
-        "@sqlite_archive//:LICENSE",
         "@zlib_archive//:zlib.h",
     ] + if_mkl([
         "//third_party/mkl:LICENSE",

tensorflow/tools/pip_package/BUILD

@@ -125,7 +125,6 @@ filegroup(
         "@protobuf_archive//:LICENSE",
         "@six_archive//:LICENSE",
         "@snappy//:COPYING",
-        "@sqlite_archive//:LICENSE",
         "@zlib_archive//:zlib.h",
         "@org_python_pypi_backports_weakref//:LICENSE",
     ] + if_mkl([

third_party/sqlite.BUILD

@@ -2,9 +2,9 @@
 #   Sqlite3 library. Provides utilities for interacting
 #   with sqlite3 databases.
 
-licenses(["notice"])  # BSD/MIT-like license
+licenses(["unencumbered"])  # Public Domain
 
-exports_files(["LICENSE"])
+# exports_files(["LICENSE"])
 
 cc_library(
     name = "sqlite",