SolidityType = function SolidityType(config) {
    this._inputFormatter = config.inputFormatter;
    this._outputFormatter = config.outputFormatter;
}
Should return nested type
eg.
"int[32]" => "int"
"int256[14]" => "int256"
"int[2][3]" => "int[2]"
"int" => "int"
"int[]" => "int"

@method nestedName
@param {String} name
@return {String} nested name