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
------
REL9_4_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/7e00e09872f194c3dc30faca6aff7c2a32b608f6

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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