Fix pooch hash for xml.

tests/data/pooch_registry.txt

@@ -6,8 +6,7 @@ bright_brain/2d_filter/signal0005.tif 3f4bbd3407121d89d1dc120bce3d444855d444c38e
 bright_brain/3d_filter/plane_0002.tif dd5a8f7799f7854ed8626a5b35cc7c9611ebf52c350b0474cbebe46b1c6f7433
 bright_brain/3d_filter/plane_0003.tif bf595ac9e760d27d1a7bf4da264a65d551f7d0918a3f2b9fba80bcef8a17a064
 bright_brain/3d_filter/plane_0004.tif 64ec4f9c131545753b9ddac667b2033602ec594a9fbb10e83299de91599067ac
-bright_brain/detected_cells.xml d03ebeca4ae3e4758bf7059ce0be64e6d75e2553cb8d93fedee6345f1c511275
-bright_brain/info.txt 2fa6de1540048e7106cff8fd0297a6b311705cf5933805312ab2dfb35d4ce2aa
+bright_brain/detected_cells.xml 6f8e6a316576e4b38d3b5c04d58442288403b8a470011c16d3303c12fe60e7b3
 bright_brain/peak_enhanced/signal0001.tif 6a25266b695dfd8c3cf858bdb7db93d1ddaaf91cbcb8f82dd67b3243b1fce471
 bright_brain/peak_enhanced/signal0002.tif 34d5a8457987811101d921c2553ab8ba60a731b3d3caf81d1a6b5d1fbc42bb93
 bright_brain/peak_enhanced/signal0003.tif cca9ac6e038fe608f0cb57a9a0ef990290a9c1463b1ae358290af60427e7c11b
@@ -65,7 +64,6 @@ edge_cells_brain/3d_filter/plane_0018.tif d75f0a2e767dfa46f0d2cc3f63c367391eac47
 edge_cells_brain/3d_filter/plane_0019.tif e7ee64795b3f07c4cff4f8a2700ba0c1055604ce50039fe0590c900c6ece43b8
 edge_cells_brain/3d_filter/plane_0020.tif 7f94a93aa45877be81732c5be4f4d1d67bb1d4059bb6de833d60c146be621efc
 edge_cells_brain/detected_cells.xml 5519a25a60bfd0d15af86eab2d5edc3c249c0afd2c6d83a9a46838ffb6fe9543
-edge_cells_brain/info.txt 779b34aae0ef50fad814e86409ee48839b2970c63eb5124548cfbc46126157fe
 edge_cells_brain/peak_enhanced/signal0000.tif 11dc924b3f30def59f6ca0b31a428a8cb454c163f4e6417d620659028ac544d9
 edge_cells_brain/peak_enhanced/signal0001.tif ac3605624094838c229f2d4ca2af9df9df17ba742b11d7ca684c42ce8e49557e
 edge_cells_brain/peak_enhanced/signal0002.tif a7759610b69fd0e9d023231488038482d8e810b9f4c096374ea267d2b7e2c5e7