Remove deprecated syntax for Babel properties

Remove deprecated syntax for Babel properties

* doc/org.texi (Header arguments in Org mode properties): Remove
  reference to deprecated syntax.
* lisp/ob-core.el (org-babel-params-from-properties): Ignore deprecated
  syntax.
* testing/examples/babel.org:
* testing/examples/normal.org:
* testing/examples/ob-header-arg-defaults.org:
* testing/examples/property-inheritance.org:
* testing/lisp/test-ob-header-arg-defaults.el
(test-ob-header-arg-defaults/global/noweb):
(test-ob-header-arg-defaults/global/call):
(test-ob-header-arg-defaults/tree/overwrite/call):
(test-ob-header-arg-defaults/tree/overwrite/noweb):
(test-ob-header-arg-defaults/tree/accumulate/call):
(test-ob-header-arg-defaults/tree/accumulate/noweb):
(test-ob-header-arg-defaults/tree/complex/call):
(test-ob-header-arg-defaults/tree/complex/noweb):
* testing/lisp/test-ob.el (test-ob/elisp-in-header-arguments):
* testing/lisp/test-property-inheritance.el
(test-org-property-accumulation-overwrite-use): Update syntax.
(test-org-property-accumulation-append-use): Use new syntax.
(test-org-property-accumulation-top-val)
(test-org-property-accumulation-overwrite-val)
(test-org-property-accumulation-append-val): Remove tests.