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
------
REL8_4_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/4671c301ebcba30c1623908fec47ee59bdcf2239

Modified Files
--------------
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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