Remove indexing chart from geoshape nightly (elastic#661)

As discussed in [^1] this commit removes the indexing chart from
the geoshape nightlies because we aren't interested in indexing
results and they show volatility due to indexing with >1 clients.

[^1]: elastic/elasticsearch-benchmarks#879 (comment)

night_rally/resources/race-configs-group-3.json

@@ -119,7 +119,6 @@
                 "name": "geoshape-append-defaults-1node",
                 "label": "add-defaults",
                 "charts": [
-                  "indexing",
                   "query",
                   "gc",
                   "io"