Merge pull request matplotlib#30197 from QuLogic/no-userdemo

DOC: Remove last userdemo example

Author: timhoffm

galleries/examples/subplots_axes_and_figures/gridspec_nested.py

@@ -1,4 +1,6 @@
 """
+.. redirect-from:: /gallery/userdemo/demo_gridspec06
+
 ================
 Nested Gridspecs
 ================

galleries/examples/userdemo/README.txt

@@ -1,7 +1,7 @@
 """
 .. redirect-from:: /tutorials/intermediate/legend_guide
-.. redirect-from:: /galleries/examples/userdemo/simple_legend01
-.. redirect-from:: /galleries/examples/userdemo/simple_legend02
+.. redirect-from:: /gallery/userdemo/simple_legend01
+.. redirect-from:: /gallery/userdemo/simple_legend02
 
 .. _legend_guide:
 

galleries/examples/userdemo/demo_gridspec06.py

@@ -196,7 +196,6 @@ convention = "numpy"
 "galleries/examples/user_interfaces/mpl_with_glade3_sgskip.py" = ["E402"]
 "galleries/examples/user_interfaces/pylab_with_gtk3_sgskip.py" = ["E402"]
 "galleries/examples/user_interfaces/pylab_with_gtk4_sgskip.py" = ["E402"]
-"galleries/examples/userdemo/pgf_preamble_sgskip.py" = ["E402"]
 
 "lib/matplotlib/__init__.py" = ["F822"]
 "lib/matplotlib/_cm.py" = ["E202", "E203", "E302"]