docs: update example and remove excess whitespace

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Author: kgryte

lib/node_modules/@stdlib/complex/float64/base/mul-add/README.md

@@ -42,8 +42,6 @@ Performs a multiply-add operation involving three double-precision complex float
 
 ```javascript
 var Complex128 = require( '@stdlib/complex/float64/ctor' );
-var real = require( '@stdlib/complex/float64/real' );
-var imag = require( '@stdlib/complex/float64/imag' );
 
 var z1 = new Complex128( 5.0, 3.0 );
 var z2 = new Complex128( -2.0, 1.0 );

lib/node_modules/@stdlib/complex/float64/base/mul-add/docs/types/test.ts

@@ -465,4 +465,3 @@ import muladd = require( './index' );
 	muladd.strided( z1, 1, 0, z2, 1, 0, z3, 1, 0, out, 1 ); // $ExpectError
 	muladd.strided( z1, 1, 0, z2, 1, 0, z3, 1, 0, out, 1, 0, {} ); // $ExpectError
 }
-