Revert "ci: circumvent AVX512 issue on GHA runners (#87)" (#88)

This reverts commit 6357c3e.

Author: Ahajha

.bazelrc

@@ -6,8 +6,3 @@ info --platforms=@platforms//host
 
 common --platforms=@mojo_host_platform
 common --host_platform=@mojo_host_platform
-
-# HACK: Github Action runners using AMD EPYC CPUs have AVX512 disabled.
-# Mojo will happily generate those instructions, but then they crash at runtime.
-# Totally disable AVX512 to circumvent the issue.
-common:ci --//:mojo_copt=--target-features=-avx512f,-avx512bw,-avx512cd,-avx512dq,-avx512vl,-avx512ifma,-avx512vbmi,-avx512vbmi2,-avx512vnni,-avx512bitalg,-avx512vpopcntdq,-avx512fp16,-avx512bf16

.github/workflows/ci.yaml

@@ -35,4 +35,4 @@ jobs:
       - name: CPU Info
         run: |
           lscpu || true
-      - run: bazel test --config=ci //...
+      - run: bazel test //...

mojo/extensions.bzl

@@ -4,8 +4,14 @@ load("//mojo:mojo_host_platform.bzl", "mojo_host_platform")
 load("//mojo/private:mojo_gpu_toolchains_repository.bzl", "mojo_gpu_toolchains_repository")
 
 _PLATFORMS = ["linux_aarch64", "linux_x86_64", "macos_arm64"]
-_DEFAULT_VERSION = "1.0.0b2.dev2026051806"
+_DEFAULT_VERSION = "1.0.0b2.dev2026060706"
 _KNOWN_SHAS = {
+    "1.0.0b2.dev2026060706": {
+        "linux_aarch64": "ff57b49bb38eb832302a72d4f4c2f2c7553bf559ee5de2798daafb57a37877e8",
+        "linux_x86_64": "e28b4b663cce73416507f957b54d2b4c96a7bd3f42bbe41ec74e8c0b6f93444c",
+        "macos_arm64": "45261916bb30cfe16d2bd04bcfcf3ded8dca0934ec33b559316891a5217588e6",
+        "mojo_compiler_mojo_libs": "4452a8ad98634178c0cae20799a41e385a306159f94b409955ac95e052dd9e55",
+    },
     "1.0.0b2.dev2026051806": {
         "linux_aarch64": "224c4c1590debdff509bde74ead2da7b3eef2bc052380627e824072fe18bef05",
         "linux_x86_64": "7775e0386cb564cfd09f34c74209b80fc5a5d43b5ac20e36e638032e0f0cd63a",

tests/python/python_shared_library.mojo

@@ -21,8 +21,7 @@ def PyInit_python_shared_library() -> PythonObject:
         abort(String("failed to create Python module: ", e))
 
 
-@export
-def mojo_count_args(py_self: PyObjectPtr, args: PyObjectPtr) -> PyObjectPtr:
+def mojo_count_args(py_self: PyObjectPtr, args: PyObjectPtr) abi("C") -> PyObjectPtr:
     ref cpython = Python().cpython()
 
     var count = cpython.PyObject_Length(args)