Remove another duplicated table.

[drwells]

Part of #14667.

[masterleinad]

/home/runner/work/dealii/dealii/doc/news/9.4.0-vs-9.5.0.h:1008: warning: explicit link request to 'point_gradients()' could not be resolved
deprecated:101: warning: explicit link request to 'Vector< Number >' could not be resolved
warning: Inheritance graph for 'AlignedVector' not generated, too many nodes (57), threshold is 50. Consider increasing DOT_GRAPH_MAX_NODES.
error: could not copy file /home/runner/work/dealii/dealii/doc/doxygen/images/dgp_doesnt_contain_p.png to /home/runner/work/dealii/dealii/build/doc/doxygen/./deal.II/dgp_doesnt_contain_p.png
warning: Inheritance graph for 'SmartPointer' not generated, too many nodes (142), threshold is 50. Consider increasing DOT_GRAPH_MAX_NODES.
warning: Inheritance graph for 'Subscriptor' not generated, too many nodes (230), threshold is 50. Consider increasing DOT_GRAPH_MAX_NODES.
warning: Inheritance graph for 'Table' not generated, too many nodes (58), threshold is 50. Consider increasing DOT_GRAPH_MAX_NODES.
warning: Inheritance graph for 'Tensor' not generated, too many nodes (63), threshold is 50. Consider increasing DOT_GRAPH_MAX_NODES.

looks unrelated, though.