decruft project files

the "generated by qt creator" header is not supposed to be checked in.

Change-Id: I7626c0bd16f83d81b3facd216a04e7d505942256
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>

tests/baselineserver/src/baselineserver.pro

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-# Project created by QtCreator 2010-08-11T11:51:09
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 QT       += core network
 
 # gui needed for QImage

tests/manual/qcursor/allcursors/allcursors.pro

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-# Project created by QtCreator 2009-08-05T17:13:23
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 TARGET = tst_allcursors
 TEMPLATE = app
 QT = core gui widgets

tests/manual/qcursor/grab_override/grab_override.pro

-#-------------------------------------------------
-#
-# Project created by QtCreator 2009-08-05T17:13:23
-#
-#-------------------------------------------------
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 TARGET = t_cursors
 TEMPLATE = app
 QT = core gui widgets

tests/manual/qtbug-8933/qtbug-8933.pro

-#-------------------------------------------------
-#
-# Project created by QtCreator 2010-03-16T14:40:16
-#
-#-------------------------------------------------
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 TARGET = qtbug-8933
 TEMPLATE = app
 QT += widgets