Remove support for Python 3.8.

Python 3.8 has been deprecated upstream, and any tests depending on Homebrew already stopped working. Following our support policy, we are removing support for 3.8 from our packages, too.

PiperOrigin-RevId: 686012836
Change-Id: Ibd220eb9c10e9a74bbd4443c1d7286a1fde9e5e5

python/build_requirements.txt

@@ -4,8 +4,6 @@ auditwheel==5.4.0; platform_system == 'Linux' \
     --hash=sha256:d8410a17523427ba3f7b60c9701d23de28b8f94fa5dab732aa6c30d160df8127
 build==1.0.3 \
     --hash=sha256:589bf99a67df7c9cf07ec0ac0e5e2ea5d4b37ac63301c4986d1acb126aa83f8f
-etils[epath]==1.3.0; python_version == '3.8' \
-    --hash=sha256:809a92ff72f12149441492cf4d9a26b56a4741dffb4dfb9c4c7b7afe055c2d28
 etils[epath]==1.5.1; python_version >= '3.9' \
     --hash=sha256:2c1bfa2817eb4881cb509097f1e65ac6160126ba74ec47b3bb47ee678628d8c8
 glfw==2.6.2 \
@@ -14,12 +12,6 @@ glfw==2.6.2 \
     --hash=sha256:fb56cd24f9e173cdddc8f6ebaac4f52304a1dfcae1dadd583038355b73c1ae06 \
     --hash=sha256:faa5596aad5490cdd8657931a66636508c1015a8b7b47018318bb72fcd2b9014 \
     --hash=sha256:d8e4f087eba45f7f4815e3e912867ed5ca16d1047b0958c52047f5b53be67059
-numpy==1.24.4; python_version == '3.8' \
-    --hash=sha256:692f2e0f55794943c5bfff12b3f56f99af76f902fc47487bdfe97856de51a706 \
-    --hash=sha256:dd80e219fd4c71fc3699fc1dadac5dcf4fd882bfc6f7ec53d30fa197b8ee22dc \
-    --hash=sha256:a5425b114831d1e77e4b5d812b69d11d962e104095a5b9c3b641a218abcc050e \
-    --hash=sha256:04640dab83f7c6c85abf9cd729c5b65f1ebd0ccf9de90b270cd61935eef0197f \
-    --hash=sha256:1452241c290f3e2a312c137a9999cdbf63f78864d63c79039bda65ee86943f61
 numpy==1.26.0; python_version >= '3.9' \
     --hash=sha256:166b36197e9debc4e384e9c652ba60c0bacc216d0fc89e78f973a9760b503388 \
     --hash=sha256:f042f66d0b4ae6d48e70e28d487376204d3cbf43b84c03bac57e28dac6151581 \

python/pyproject.toml

@@ -9,7 +9,7 @@ authors = [
     {name = "Google DeepMind", email = "mujoco@deepmind.com"},
 ]
 description = "MuJoCo Physics Simulator"
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 license = {text = "Apache License 2.0"}
 classifiers = [
     "Development Status :: 5 - Production/Stable",
@@ -18,7 +18,6 @@ classifiers = [
     "License :: OSI Approved :: Apache Software License",
     "Natural Language :: English",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",