Remove netCDF4 pin on Python 3.13

Author: domdfcoding

tox.ini

@@ -5,6 +5,7 @@
 #     * testenv
 #     * testenv:.package
 #     * testenv:py313-dev
+#     * testenv:py313
 #     * testenv:py312-dev
 #     * testenv:py312
 #     * testenv:docs
@@ -49,6 +50,12 @@ setenv =
     PYTHONDEVMODE=1
     PIP_DISABLE_PIP_VERSION_CHECK=1
 
+[testenv:py313]
+download = True
+setenv =
+    PYTHONDEVMODE=1
+    PIP_DISABLE_PIP_VERSION_CHECK=1
+
 [testenv:py312]
 download = True
 setenv =
@@ -200,16 +207,6 @@ ignore = W002
 toplevel = pymassspec_plot
 package = pymassspec_plot
 
-[testenv:py313]
-download = True
-setenv =
-    PYTHONDEVMODE=1
-    PIP_DISABLE_PIP_VERSION_CHECK=1
-    UNSAFE_PYO3_SKIP_VERSION_CHECK=1
-deps =
-    -r{toxinidir}/tests/requirements.txt
-    netcdf4==1.6.5
-
 [pytest]
 addopts = --color yes --durations 25 --mpl
 timeout = 300