Revert "Add prototype of projection function"

This reverts commit 3a28b5f.

Author: Goneiross

src/__tests__/matrix/projection.js

@@ -23,4 +23,3 @@ export {
 export { default as LuDecomposition, default as LU } from './dc/lu.js';
 export { default as QrDecomposition, default as QR } from './dc/qr.js';
 export { default as NNMFDecomposition, default as NNMF } from './dc/nnmf.js';
-export { projection } from './projection';