Option 1:
If you want to disable the display of suggestions then you can provide false value for showAutoSuggest in ../searchblox/plugin/data/facet.json at line no 24
"showAutoSuggest": "false",
Option 2:
If you want to completely remove autosuggest (i.e., even generation of autosuggest servlet) then go to ../searchblox/plugin/js/modules/searchblox-module.js and comment line no 22 as below
//'searchblox.autocomplete',
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