fix(docs): take sphinx-toolbox from PyPI only

conda-forge tops out at sphinx-toolbox 4.1.2, which does not support
Sphinx 9. Declaring the package in both [feature.docs.dependencies] and
[feature.docs.pypi-dependencies] leaves the conda 4.1.2 build in the
solve, so the >=4.2.0 requirement never takes effect. Drop the conda
entry in all three manifests, matching environment-docs.yml.

Signed-off-by: Aryan Putta <aryansputta@gmail.com>

Author: aryanputta

cuda_bindings/pixi.toml

@@ -41,7 +41,6 @@ pytest = "*"
 scipy = "*"
 sphinx = ">=9,<10"
 sphinx-copybutton = "*"
-sphinx-toolbox = "*"
 
 [feature.cython-tests.dependencies]
 cython = ">=3.2.5,<3.3" # for tests that exercise APIs from cython

cuda_core/pixi.toml

@@ -109,7 +109,6 @@ sphinx = ">=9,<10"
 sphinx-copybutton = "*"
 myst-nb = "*"
 enum_tools = "*"
-sphinx-toolbox = "*"
 pyclibrary = "*"
 
 [feature.docs.pypi-dependencies]

cuda_pathfinder/pixi.toml

@@ -33,7 +33,6 @@ pytest = "*"
 scipy = "*"
 sphinx = ">=9,<10"
 sphinx-copybutton = "*"
-sphinx-toolbox = "*"
 
 [feature.cu12.system-requirements]
 cuda = "12"