Apply suggestions from code review

Co-authored-by: Athan <kgryte@gmail.com>
Signed-off-by: Athan <kgryte@gmail.com>

Author: kgryte

lib/node_modules/@stdlib/ndarray/to-rot90/lib/main.js

@@ -21,7 +21,6 @@
 // MODULES //
 
 var isIntegerArray = require( '@stdlib/assert/is-integer-array' ).primitives;
-var isEmptyCollection = require( '@stdlib/assert/is-empty-collection' );
 var isInteger = require( '@stdlib/assert/is-integer' ).isPrimitive;
 var isPlainObject = require( '@stdlib/assert/is-plain-object' );
 var isndarrayLike = require( '@stdlib/assert/is-ndarray-like' );
@@ -84,7 +83,7 @@ function toRot90( x, options ) {
 			k = options.k;
 		}
 		if ( hasOwnProp( options, 'dims' ) ) {
-			if ( !isIntegerArray( options.dims ) && !isEmptyCollection( options.dims ) ) { // eslint-disable-line max-len
+			if ( !isIntegerArray( options.dims ) ) {
 				throw new TypeError( format( 'invalid option. `%s` option must be an array of integers. Option: `%s`.', 'dims', options.dims ) );
 			}
 			dims = options.dims;

lib/node_modules/@stdlib/ndarray/to-rot90/test/test.js

@@ -208,7 +208,6 @@ tape( 'the function throws an error if provided a `dims` option which does not c
 	x = new ndarray( 'float64', [ 1, 2, 3, 4 ], [ 2, 2 ], [ 2, 1 ], 0, 'row-major' );
 
 	values = [
-		[],
 		[ 0 ],
 		[ 0, 1, 0 ]
 	];