pgsql: Remove inadvertent copyright violation in largeobject regression

Remove inadvertent copyright violation in largeobject regression test.

Robert Frost is no longer with us, but his copyrights still are, so
let's stop using "Stopping by Woods on a Snowy Evening" as test data
before somebody decides to sue us. Wordsworth is more safely dead.

Branch
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REL9_1_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/d5ea7e649462ce0fba7e508e9efbb9f87e8c220b

Modified Files
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src/test/regress/input/largeobject.source | 60 ++++++++++--------
src/test/regress/output/largeobject.source | 88 ++++++++++++++------------
src/test/regress/output/largeobject_1.source | 88 ++++++++++++++------------
3 files changed, 130 insertions(+), 106 deletions(-)

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