Logically dead code related to embedded stream name in SwGrfNode\SdrGrafObj

See also:
286e2f5c6ec829bc0987b1be7016699f7ef03e5e

Since embedded URL exists until the first swap in these lines
are not needed anymore.

Change-Id: Ie6bf8efe7808cf42f20f7b4b3f8cb927555c0ea8
Remove now useless setTextEmbeddedGraphicURL()

Since this commit:
286e2f5c6ec829bc0987b1be7016699f7ef03e5e
it's not necessary to update the package URL.

Change-Id: I25c829e9bc0c666838baf19cd60f19938ebb430c