remove datadeps from tox.ini; enable remote_data when measuring coverage

tox.ini

@@ -1,7 +1,7 @@
 [tox]
 envlist =
-    py{38,39,310,311}-test{,-devdeps,-datadeps}{,-cov}
-    py{38,39,310,311}-test-numpy{118,119,120,121}
+    py{38,39,310,311}-test{,-devdeps}{,-cov}
+    py{38,39,310,311}-test-numpy{120,121,122,123}
     py{38,39,310,311}-test-astropy{lts,rc}
     build_docs
     codestyle
@@ -32,19 +32,22 @@ changedir = .tmp/{envname}
 #
 description =
     run tests
-    datadeps: with specreduce_data package installed locally
     devdeps: with the latest developer version of key dependencies
     oldestdeps: with the oldest supported version of key dependencies
-    cov: and test coverage
+    cov: enable remote data and measure test coverage
     numpy120: with numpy 1.20.*
     numpy121: with numpy 1.21.*
+    numpy122: with numpy 1.22.*
+    numpy123: with numpy 1.23.*
     astropylts: with the latest astropy LTS
 
 # The following provides some specific pinnings for key packages
 deps =
 
     numpy120: numpy==1.20.*
     numpy121: numpy==1.21.*
+    numpy122: numpy==1.22.*
+    numpy123: numpy==1.23.*
 
     astropy51: astropy==5.1.*
     astropylts: astropy==5.1.*
@@ -53,8 +56,6 @@ deps =
     devdeps: git+https://github.com/astropy/astropy.git#egg=astropy
     devdeps: git+https://github.com/astropy/specutils.git#egg=specutils
 
-    datadeps: git+https://github.com/astropy/specreduce-data.git#egg=specreduce_data
-
     oldestdeps: numpy==1.20
     oldestdeps: astropy==5.1
     oldestdeps: scipy==1.6.0
@@ -70,7 +71,7 @@ extras =
 commands =
     pip freeze
     !cov: pytest --pyargs specreduce {toxinidir}/docs {posargs}
-    cov: pytest --pyargs specreduce {toxinidir}/docs --cov specreduce --cov-config={toxinidir}/setup.cfg {posargs}
+    cov: pytest --pyargs specreduce {toxinidir}/docs --cov specreduce --cov-config={toxinidir}/setup.cfg --remote-data {posargs}
     cov: coverage xml -o {toxinidir}/coverage.xml
 
 pip_pre =