[wheel] Remove vendored libcrypt

Whatever Python 3.7 manylinux somethings caused us to add this in the
first place no longer seem to be relevant.

tools/wheel/image/dependencies/projects.cmake

@@ -1,11 +1,3 @@
-if(NOT APPLE)
-    # libxcrypt
-    set(libxcrypt_version 4.4.25)
-    set(libxcrypt_url "https://github.com/besser82/libxcrypt/archive/v${libxcrypt_version}/libxcrypt-${libxcrypt_version}.tar.gz")
-    set(libxcrypt_md5 "4828b1530f5bf35af0b45b35acc4db1d")
-    list(APPEND ALL_PROJECTS libxcrypt)
-endif()
-
 # zlib
 set(zlib_version 1.2.11)
 set(zlib_url "https://github.com/madler/zlib/archive/v${zlib_version}.zip")

tools/workspace/python/repository.bzl

@@ -94,6 +94,12 @@ def _get_linkopts(repo_ctx, python_config):
     ).stdout.strip().split(" ")
     linkopts = [linkopt for linkopt in linkopts if linkopt]
 
+    # Opt-out of support for the (deprecated) _crypt module. Linking it just
+    # bloats our wheels for no good reason. Once Python 3.13 is our minimum
+    # supported version, we can remove this stanza.
+    if "-lcrypt" in linkopts:
+        linkopts.remove("-lcrypt")
+
     # Undo whitespace splits for options with a positional argument, e.g., we
     # want ["-framework CoreFoundation"] not ["-framework", "CoreFoundation"].
     for i in reversed(range(len(linkopts))):