remove: remove nanvariancech from namespace

This commit removes the `nanvariancech` symbol from the `@stdlib/stats/base` namespace due to a package migration.

BREAKING CHANGE: remove `nanvariancech`

To migrate, users should access the same symbol via the `@stdlib/stats/strided` namespace.

Ref: #4797

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Author: gururaj1512

lib/node_modules/@stdlib/stats/base/docs/types/index.d.ts

@@ -32,7 +32,6 @@ import nanstdevtk = require( '@stdlib/stats/base/nanstdevtk' );
 import nanstdevwd = require( '@stdlib/stats/base/nanstdevwd' );
 import nanstdevyc = require( '@stdlib/stats/base/nanstdevyc' );
 import nanvariance = require( '@stdlib/stats/base/nanvariance' );
-import nanvariancech = require( '@stdlib/stats/base/nanvariancech' );
 import sdsnanmean = require( '@stdlib/stats/base/sdsnanmean' );
 import sdsnanmeanors = require( '@stdlib/stats/base/sdsnanmeanors' );
 import snanmean = require( '@stdlib/stats/base/snanmean' );
@@ -337,29 +336,6 @@ interface Namespace {
 	*/
 	nanvariance: typeof nanvariance;
 
-	/**
-	* Computes the variance of a strided array ignoring `NaN` values and using a one-pass trial mean algorithm.
-	*
-	* @param N - number of indexed elements
-	* @param correction - degrees of freedom adjustment
-	* @param x - input array
-	* @param stride - stride length
-	* @returns variance
-	*
-	* @example
-	* var x = [ 1.0, -2.0, NaN, 2.0 ];
-	*
-	* var v = ns.nanvariancech( x.length, 1, x, 1 );
-	* // returns ~4.3333
-	*
-	* @example
-	* var x = [ 1.0, -2.0, NaN, 2.0 ];
-	*
-	* var v = ns.nanvariancech.ndarray( x.length, 1, x, 1, 0 );
-	* // returns ~4.3333
-	*/
-	nanvariancech: typeof nanvariancech;
-
 	/**
 	* Computes the arithmetic mean of a single-precision floating-point strided array, ignoring `NaN` values and using extended accumulation.
 	*

lib/node_modules/@stdlib/stats/base/lib/index.js

@@ -144,15 +144,6 @@ setReadOnly( ns, 'nanstdevyc', require( '@stdlib/stats/base/nanstdevyc' ) );
 */
 setReadOnly( ns, 'nanvariance', require( '@stdlib/stats/base/nanvariance' ) );
 
-/**
-* @name nanvariancech
-* @memberof ns
-* @readonly
-* @type {Function}
-* @see {@link module:@stdlib/stats/base/nanvariancech}
-*/
-setReadOnly( ns, 'nanvariancech', require( '@stdlib/stats/base/nanvariancech' ) );
-
 /**
 * @name ndarray
 * @memberof ns