MNT: Update gitignore items

This removes some old files that are no longer being produced
and also ignores some new files that may come in via doc builds.
In particular the ne_10m_bathymetry example.

.gitignore

@@ -7,22 +7,12 @@ dist
 
 # cartopy build files
 lib/cartopy/_version.py
-lib/cartopy/trace.cpp
-lib/cartopy/trace.so
-lib/cartopy/trace.*.so
-lib/cartopy/trace.pyd
-lib/cartopy/_crs.c
-lib/cartopy/_crs.so
-lib/cartopy/_crs.*.so
-lib/cartopy/_crs.pyd
-lib/cartopy/geodesic/_geodesic.c
-lib/cartopy/geodesic/_geodesic.so
-lib/cartopy/geodesic/_geodesic.*.so
-lib/cartopy/geodesic/_geodesic.pyd
+*.cpp
+*.so
+
 docs/build
 lib/cartopy/tests/mpl/output/
 docs/source/cartopy/examples/
-docs/source/cartopy_outline.rst
 docs/source/gallery
 docs/source/matplotlib/coastlines.p??
 docs/source/*/generated/
@@ -33,10 +23,10 @@ lib/cartopy/data/gshhs
 lib/cartopy/data/shapefiles
 
 # some configuration files which aren't part of cartopy repo
-lib/cartopy/tests/.pep8_test_exclude.txt
 lib/cartopy/siteconfig.py
 
-cartopy_test_output
+# Possible local downloads of these files during doc builds
+ne_10m_bathymetry*
 
 
 benchmarks/results/