third_party/musl: delete

This is no longer used after the migration to toolchain_cc.

Change-Id: Ib0c1a80be4aa80c4f08d9b2927ceabd5bb4b4148
Reviewed-on: https://review.monogon.dev/c/monogon/+/4284
Tested-by: Jenkins CI
Reviewed-by: Tim Windelschmidt <tim@monogon.tech>
diff --git a/build/bazel/third_party.MODULE.bazel b/build/bazel/third_party.MODULE.bazel
index a7251fe..b530fe5 100644
--- a/build/bazel/third_party.MODULE.bazel
+++ b/build/bazel/third_party.MODULE.bazel
@@ -144,16 +144,6 @@
     urls = ["https://github.com/intel/Intel-Linux-Processor-Microcode-Data-Files/archive/refs/tags/microcode-%s.tar.gz" % INTEL_UCODE_VERSION],
 )
 
-MUSL_VERSION = "1.1.24"
-
-http_archive(
-    name = "musl",
-    build_file = "//third_party/musl:musl.bzl",
-    integrity = "sha256-E3DJqBKyzyp9koAlEMygBYzDfmanvt1wBR8KNAFQIqM=",
-    strip_prefix = "musl-" + MUSL_VERSION,
-    urls = ["https://www.musl-libc.org/releases/musl-%s.tar.gz" % MUSL_VERSION],
-)
-
 UTIL_LINUX_VERSION = "2.36.2"
 
 http_archive(
diff --git a/third_party/musl/BUILD.bazel b/third_party/musl/BUILD.bazel
deleted file mode 100644
index e02833c..0000000
--- a/third_party/musl/BUILD.bazel
+++ /dev/null
@@ -1,37 +0,0 @@
-genrule(
-    name = "musl",
-    srcs = [
-        "@musl//:all",
-    ],
-    outs = [
-        # C Runtimes
-        "crt1.o",
-        "crti.o",
-        "crtn.o",
-        "rcrt1.o",
-        "Scrt1.o",
-
-        # Static musl libc
-        "libc.a",
-
-        # Placeholder archives
-        "libcrypt.a",
-        "libdl.a",
-        "libm.a",
-        "libpthread.a",
-        "libresolv.a",
-        "librt.a",
-        "libutil.a",
-        "libxnet.a",
-    ],
-    cmd = """
-    OUT=$$PWD/$(RULEDIR)
-    (
-        export CFLAGS="-static-pie -fPIC"
-        cd {path}
-        ./configure --prefix=$$OUT --syslibdir=$$OUT --libdir=$$OUT
-        make -j $$(nproc) install-libs
-    ) > /dev/null
-    """.format(path = package_relative_label("@musl//:all").workspace_root),
-    visibility = ["//visibility:public"],
-)
diff --git a/third_party/musl/musl.bzl b/third_party/musl/musl.bzl
deleted file mode 100644
index 9fbdeaf..0000000
--- a/third_party/musl/musl.bzl
+++ /dev/null
@@ -1 +0,0 @@
-filegroup(name = "all", srcs = glob(["**"]), visibility = ["//visibility:public"])