GN: Drop chrome (commented out) "data" entries for NaCl IRT files
GN: Drop chrome (commented out) "data" entries for NaCl IRT files

These were having no effect since the contents are commented out.
But they should be unnecessary anyway, because //components/nacl
has //ppapi/native_client:irt in data_deps so (even indirect)
dependencies on //components/nacl are enough to ensure the IRT
files are built when the chrome executable is built.

BUG= none
R=dpranke@chromium.org, thakis@chromium.org

Review URL: https://codereview.chromium.org/1493783004

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#363570}

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