FreeBSD: remove QAT and lz4 repository registrations and build targets.

Intel QAT (qatlib, qatzip, qat_zstd) and CryptoMB (ipp_crypto_crypto_mb)
and DLB (intel_dlb) are Linux x86_64-only hardware acceleration extensions
and are never built on FreeBSD.  lz4 is only used as a build-time dependency
of QATzip (linked into libqatzip.a) and is similarly unneeded.

Remove the repository registrations so Bazel does not attempt to fetch
them, and remove the lz4 foreign_cc build target and its use in
librdkafka_build (librdkafka is a Kafka-mesh contrib extension not built
in this pomerium-envoy-custom configuration).

--- a/bazel/repositories.bzl
+++ b/bazel/repositories.bzl
@@ -168,11 +168,6 @@
     _com_github_grpc_grpc()
     _rules_proto_grpc()
     _com_github_unicode_org_icu()
-    _com_github_intel_ipp_crypto_crypto_mb()
-    _com_github_intel_qatlib()
-    _com_github_intel_qatzip()
-    _com_github_qat_zstd()
-    _com_github_lz4_lz4()
     _com_github_jbeder_yaml_cpp()
     _com_github_libevent_libevent()
     _com_github_luajit_luajit()

--- a/bazel/foreign_cc/BUILD
+++ b/bazel/foreign_cc/BUILD
@@ -79,26 +79,7 @@
     tags = ["skip_on_windows"],
     deps = [
         "gperftools_build",
-    ],
-)
-
-make(
-    name = "lz4",
-    args = [
-        "MOREFLAGS='-fPIC'",
-        "BUILD_SHARED=no",
-    ],
-    lib_source = "@com_github_lz4_lz4//:all",
-    out_static_libs = [
-        "liblz4.a",
     ],
-    tags = ["skip_on_windows"],
-    targets = [
-        "lib",
-        "install",
-    ],
-    visibility = ["//visibility:public"],
-    alwayslink = False,
 )

 # Kafka client dependency used by Kafka-mesh filter.
@@ -116,7 +97,6 @@
     targets = [
         "ARFLAGS='' WITH_LDS='n' libs install-subdirs",
     ],
-    deps = [":lz4"],
     alwayslink = True,
 )