remove: remove imul from namespace

This commit removes the `imul` symbol from the `@stdlib/math/base/ops`
namespace due to a package migration.

BREAKING CHANGE: remove `imul`

To migrate, users should access the same symbol via the
`@stdlib/number/int32/base` namespace.

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
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    status: passed
  - task: lint_markdown
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    status: passed
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---

Author: gururaj1512

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

@@ -29,7 +29,6 @@ import cneg = require( '@stdlib/math/base/ops/cneg' );
 import cnegf = require( '@stdlib/math/base/ops/cnegf' );
 import csub = require( '@stdlib/math/base/ops/csub' );
 import csubf = require( '@stdlib/math/base/ops/csubf' );
-import imul = require( '@stdlib/math/base/ops/imul' );
 import imuldw = require( '@stdlib/math/base/ops/imuldw' );
 import umuldw = require( '@stdlib/math/base/ops/umuldw' );
 import addf = require( '@stdlib/number/float32/base/add' );
@@ -414,19 +413,6 @@ interface Namespace {
 	*/
 	csubf: typeof csubf;
 
-	/**
-	* Performs C-like multiplication of two signed 32-bit integers.
-	*
-	* @param a - signed 32-bit integer
-	* @param b - signed 32-bit integer
-	* @returns product
-	*
-	* @example
-	* var v = ns.imul( -10|0, 4|0 );
-	* // returns -40
-	*/
-	imul: typeof imul;
-
 	/**
 	* Performs multiplication of two signed 32-bit integers and returns an array of two signed 32-bit integers which represents the signed 64-bit integer product.
 	*

lib/node_modules/@stdlib/math/base/ops/lib/index.js

@@ -117,15 +117,6 @@ setReadOnly( ns, 'csub', require( '@stdlib/math/base/ops/csub' ) );
 */
 setReadOnly( ns, 'csubf', require( '@stdlib/math/base/ops/csubf' ) );
 
-/**
-* @name imul
-* @memberof ns
-* @readonly
-* @type {Function}
-* @see {@link module:@stdlib/math/base/ops/imul}
-*/
-setReadOnly( ns, 'imul', require( '@stdlib/math/base/ops/imul' ) );
-
 /**
 * @name imuldw
 * @memberof ns