r.import: remove hardcoded memory limit (r.in.gdal will take care)

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@73359 15284696-431f-4ddb-bdfa-cd5b030d7da7

scripts/r.import/r.import.py

@@ -39,7 +39,6 @@
 #% type: integer
 #% required: no
 #% multiple: no
-#% options: 0-2047
 #% label: Maximum memory to be used (in MB)
 #% description: Cache size for raster rows
 #% answer: 300