pro2cmake: Remove warning about line continuations

Almost every non-trivial .pro file has line continuations.
Remove the warning as there's nothing the user can do about it.

Change-Id: Ic8a54e5e5cc39a31267800edde4b0ff2b0276a48
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>

util/cmake/pro2cmake.py

@@ -1059,10 +1059,6 @@ class QmakeParser:
             old_contents = contents
             contents = fixup_comments(contents)
             contents = fixup_linecontinuation(contents)
-
-            if old_contents != contents:
-                print('Warning: Fixed line continuation in .pro-file!\n'
-                      '         Position information in Parsing output might be wrong!')
             result = self._Grammar.parseString(contents, parseAll=True)
         except pp.ParseException as pe:
             print(pe.line)