remove natural=fell preset

[mkoniecz]

What steps will reproduce the problem?

1. create area
2. select it
3. start adding tag with key natural and value fell

What is the expected result?

natural=fell is not autocomplted

What happens instead?

natural=fell is in preset

Please provide any additional information below. Attach a screenshot if possible.

as part of ​https://github.com/gravitystorm/openstreetmap-carto/issues/545 I checked how natural=fell is used

Actual use of the tag for areas as of October 2017 includes different kinds of treeless areas, in particular areas vegetated primarily by grasses (Poaceae) which are commonly tagged as natural=grassland or landuse=meadow, areas mostly vegetated by dwarf scrubs which are more commonly tagged natural=heath, rain fed peat producing wetlands for which the established tagging is natural=wetland + wetland=bog and areas with very little or no vegetation which in most cases qualify as natural=scree or natural=bare_rock. When mapping preferably choose the tag that best and most precisely describes the specific setting you are looking at. Data users should not expect a particular type of surface or vegetation for areas tagged natural=fell.

from ​https://wiki.openstreetmap.org/wiki/Tag:natural%3Dfell appears to be a good description of the situation

Therefore I think that natural=fell usage should not be encouraged and I propose to remove it from presets

matching iD report: ​https://github.com/openstreetmap/iD/issues/4502

URL:http://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2017-10-30 23:58:23 +0100 (Mon, 30 Oct 2017)
Build-Date:2017-10-31 02:33:18
Revision:13064
Relative:URL: ^/trunk

Identification: JOSM/1.5 (13064 en) Linux Ubuntu 16.04.3 LTS
Memory Usage: 428 MB / 871 MB (127 MB allocated, but free)
Java version: 1.8.0_151-b12, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Screen: :0.0 1920x1080
Maximum Screen Size: 1920x1080
Dataset consistency test: No problems found

Plugins:
+ OpeningHoursEditor (33185)
+ buildings_tools (33735)
+ lakewalker (33712)
+ reverter (33572)
+ undelete (33480)

Map paint styles:
- https://josm.openstreetmap.de/josmfile?page=Styles/AdvertisingStyle&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/MaxspeedIcons&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/LessObtrusiveNodes&zip=1
+ ${HOME}/Documents/install_moje/josm_style_sidewalks/Styles_Sidewalks-style.mapcss
+ https://josm.openstreetmap.de/josmfile?page=Styles/NumberedWalkingNodeNetworks&zip=1
+ https://josm.openstreetmap.de/josmfile?page=Styles/HU-HighlightHikingTrailSigns&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Fixme&zip=1
+ ${HOME}/Desktop/tmp/josmfile

Validator rules:
+ ${HOME}/Documents/install_moje/josm_validator/josm.validator.mapcss

Last errors/warnings:
- W: Failed to load Mappaint styles from '${HOME}/Desktop/tmp/josmfile'. Exception was: java.io.FileNotFoundException: ${HOME}/Desktop/tmp/josmfile (No such file or directory)
- E: java.io.FileNotFoundException: ${HOME}/Desktop/tmp/josmfile (No such file or directory)
- W: Initializing map style ${HOME}/Desktop/tmp/josmfile completed in 2 ms (1 errors, 0 warnings)
- W: No configuration settings found.  Using hardcoded default values for all pools.