chore(tox): Drop dev, pre is good enough

tox.ini

@@ -16,8 +16,6 @@ envlist =
   py3{9,10,11}-pre-{x86,x64}
   # x64-only range
   py3{12,13,13t}-{full,pre}-x64
-  # Special environment for numpy 2.0-dev testing
-  py313-dev-x64
   install
   doctest
   style
@@ -38,7 +36,6 @@ python =
 DEPENDS =
   none: none, install
   pre: pre
-  dev: dev
   full: full, install
   min: min
 
@@ -51,7 +48,7 @@ ARCH =
 description = Pytest with coverage
 labels = test
 pip_pre =
-  pre,dev: true
+  pre: true
 pass_env =
   # getpass.getuser() sources for Windows:
   LOGNAME
@@ -67,8 +64,8 @@ pass_env =
   CLICOLOR
   CLICOLOR_FORCE
 set_env =
-  pre,dev: PIP_EXTRA_INDEX_URL=https://pypi.anaconda.org/scientific-python-nightly-wheels/simple
-  pre,dev: UV_EXTRA_INDEX_URL=https://pypi.anaconda.org/scientific-python-nightly-wheels/simple
+  pre: PIP_EXTRA_INDEX_URL=https://pypi.anaconda.org/scientific-python-nightly-wheels/simple
+  pre: UV_EXTRA_INDEX_URL=https://pypi.anaconda.org/scientific-python-nightly-wheels/simple
   py313t: PYTHONGIL={env:PYTHONGIL:0}
 extras =
   test
@@ -78,22 +75,22 @@ extras =
   !none: indexed_gzip
 
   # Matplotlib has wheels for everything except win32 (x86)
-  {min,full,pre,dev}-{x,arm}64: viewers
+  {min,full,pre}-{x,arm}64: viewers
 
   # Nightly, but not released cp313t wheels for: scipy
-  # When released, remove the py3* line and add min/full to the pre,dev line
+  # When released, remove the py3* line and add min/full to the pre line
   py3{9,10,11,12,13}-{min,full}-{x,arm}64: spm
-  {pre,dev}-{x,arm}64: spm
+  pre-{x,arm}64: spm
 
   # No cp313t wheels for: h5py, pyzstd
-  py3{9,10,11,12,13}-{min,full,pre-dev}-{x,arm}64: minc2
-  py3{9,10,11,12,13}-{min,full,pre-dev}-{x,arm}64: zstd
+  py3{9,10,11,12,13}-{min,full,pre}-{x,arm}64: minc2
+  py3{9,10,11,12,13}-{min,full,pre}-{x,arm}64: zstd
 
   # No win32 wheels for scipy after py39
   py39-full-x86: spm
 
 deps =
-  dev: pydicom @ git+https://github.com/pydicom/pydicom.git@main
+  pre: pydicom @ git+https://github.com/pydicom/pydicom.git@main
 
 uv_resolution =
   min: lowest-direct