doc: Drop broken reference to modindex in libgdiagnostics

gcc:
	* doc/libgdiagnostics/index.rst: Drop broken reference to
	`modindex`.

diff --git a/gcc/doc/libgdiagnostics/index.rst b/gcc/doc/libgdiagnostics/index.rst
index 3ae48af3d7910adcb1cb381349f5d713a2acfbd3..1e73f08aa84a5b70d910c99b8de2f6e4a03efeb7 100644 (file)
--- a/gcc/doc/libgdiagnostics/index.rst
+++ b/gcc/doc/libgdiagnostics/index.rst
@@ -109,5 +109,4 @@ Indices and tables
 ******************
 
 * :ref:`genindex`
-* :ref:`modindex`
 * :ref:`search`