diff --git a/packages/turf-flip/index.ts b/packages/turf-flip/index.ts
index 1a93455384..0a9a085243 100644
--- a/packages/turf-flip/index.ts
+++ b/packages/turf-flip/index.ts
@@ -27,8 +27,7 @@ function flip<T extends AllGeoJSON>(
   // Optional parameters
   options = options || {};
   if (!isObject(options)) throw new Error("options is invalid");
-  options.mutate = options.mutate || false;
-  const { mutate } = options;
+  const mutate = options.mutate || false;
 
   if (!geojson) throw new Error("geojson is required");
   // ensure that we don't modify features in-place and changes to the
diff --git a/packages/turf-polygon-smooth/index.d.ts b/packages/turf-polygon-smooth/index.d.ts
deleted file mode 100644
index f688901da4..0000000000
--- a/packages/turf-polygon-smooth/index.d.ts
+++ /dev/null
@@ -1,11 +0,0 @@
-import { Feature, FeatureCollection, Polygon, MultiPolygon } from "geojson";
-
-/**
- * http://turfjs.org/docs/#polygonSmooth
- */
-export default function <T extends Polygon | MultiPolygon>(
-  polygon: FeatureCollection<T> | Feature<T> | T,
-  options?: {
-    iterations?: number;
-  }
-): FeatureCollection<T>;
diff --git a/packages/turf-rewind/index.d.ts b/packages/turf-rewind/index.d.ts
deleted file mode 100644
index 8b97e9c858..0000000000
--- a/packages/turf-rewind/index.d.ts
+++ /dev/null
@@ -1,12 +0,0 @@
-import { AllGeoJSON } from "@turf/helpers";
-
-/**
- * http://turfjs.org/docs/#rewind
- */
-export default function rewind<T extends AllGeoJSON>(
-  geojson: T,
-  options?: {
-    reverse?: boolean;
-    mutate?: boolean;
-  }
-): T;
diff --git a/packages/turf-rewind/index.ts b/packages/turf-rewind/index.ts
index 76100caf62..f94a745c37 100644
--- a/packages/turf-rewind/index.ts
+++ b/packages/turf-rewind/index.ts
@@ -35,18 +35,16 @@ import type { AllGeoJSON } from "@turf/helpers";
  */
 function rewind<T extends AllGeoJSON>(
   geojson: T,
-  options?: {
+  options: {
     reverse?: boolean;
     mutate?: boolean;
-  }
+  } = {}
 ): Geometry | Feature | FeatureCollection {
   // Optional parameters
   options = options || {};
   if (!isObject(options)) throw new Error("options is invalid");
-  options.mutate = options.mutate || false;
-  options.reverse = options.reverse || false;
-
-  const { reverse, mutate } = options;
+  const mutate = options.mutate || false;
+  const reverse = options.reverse || false;
 
   // Prevent input mutation if requested.
   if (!mutate) geojson = clone(geojson);
diff --git a/packages/turf-sector/index.ts b/packages/turf-sector/index.ts
index 6ba4dc46aa..817f0685e6 100644
--- a/packages/turf-sector/index.ts
+++ b/packages/turf-sector/index.ts
@@ -35,19 +35,17 @@ function sector(
   radius: number,
   bearing1: number,
   bearing2: number,
-  options?: {
+  options: {
     steps?: number;
     units?: Units;
     properties?: GeoJsonProperties;
-  }
+  } = {}
 ): Feature<Polygon> {
   // Optional parameters
   options = options || {};
   if (!isObject(options)) throw new Error("options is invalid");
-  options.steps = options.steps || 64;
-  options.units = options.units || "kilometers";
   // Most options only for passing through to circle()
-  const { properties } = options;
+  const properties = options.properties;
 
   // validation
   if (!center) throw new Error("center is required");
diff --git a/packages/turf-shortest-path/index.ts b/packages/turf-shortest-path/index.ts
index 0a0bb0fb66..65ba0887d5 100644
--- a/packages/turf-shortest-path/index.ts
+++ b/packages/turf-shortest-path/index.ts
@@ -34,7 +34,6 @@ import { Graph, GridNode, astar } from "./lib/javascript-astar";
  * @param {Coord} end point
  * @param {Object} [options={}] optional parameters
  * @param {Geometry|Feature|FeatureCollection<Polygon>} [options.obstacles] areas which path cannot travel
- * @param {number} [options.minDistance] minimum distance between shortest path and obstacles
  * @param {string} [options.units='kilometers'] unit in which resolution & minimum distance will be expressed in; it can be degrees, radians, miles, kilometers, ...
  * @param {number} [options.resolution=100] distance between matrix points on which the path will be calculated
  * @returns {Feature<LineString>} shortest path between start and end
@@ -53,29 +52,23 @@ import { Graph, GridNode, astar } from "./lib/javascript-astar";
 function shortestPath(
   start: Coord,
   end: Coord,
-  options?: {
+  options: {
     obstacles?: Polygon | Feature<Polygon> | FeatureCollection<Polygon>;
-    minDistance?: number;
     units?: Units;
     resolution?: number;
-  }
+  } = {}
 ): Feature<LineString> {
   // Optional parameters
   options = options || {};
   if (!isObject(options)) throw new Error("options is invalid");
-  options.obstacles = options.obstacles || featureCollection([]);
-  options.units = options.units || "kilometers";
-  options.resolution = options.resolution || 100;
-  const { minDistance } = options;
-  let { obstacles, resolution } = options;
+  let obstacles = options.obstacles || featureCollection([]);
+  let resolution = options.resolution || 100;
 
   // validation
   if (!start) throw new Error("start is required");
   if (!end) throw new Error("end is required");
   if (resolution && (!isNumber(resolution) || resolution <= 0))
     throw new Error("options.resolution must be a number, greater than 0");
-  if (minDistance)
-    throw new Error("options.minDistance is not yet implemented");
 
   // Normalize Inputs
   const startCoord = getCoord(start);
diff --git a/packages/turf-simplify/index.ts b/packages/turf-simplify/index.ts
index 9074e50829..a0ae248552 100644
--- a/packages/turf-simplify/index.ts
+++ b/packages/turf-simplify/index.ts
@@ -47,20 +47,18 @@ import simplifyJS from "./lib/simplify";
  */
 function simplify<T extends AllGeoJSON>(
   geojson: T,
-  options?: {
+  options: {
     tolerance?: number;
     highQuality?: boolean;
     mutate?: boolean;
-  }
+  } = {}
 ): T {
   // Optional parameters
   options = options || {};
   if (!isObject(options)) throw new Error("options is invalid");
-  options.tolerance = options.tolerance !== undefined ? options.tolerance : 1;
-  options.highQuality = options.highQuality || false;
-  options.mutate = options.mutate || false;
-
-  const { tolerance, highQuality, mutate } = options;
+  const tolerance = options.tolerance !== undefined ? options.tolerance : 1;
+  const highQuality = options.highQuality || false;
+  const mutate = options.mutate || false;
 
   if (!geojson) throw new Error("geojson is required");
   if (tolerance && tolerance < 0) throw new Error("invalid tolerance");