[Libreoffice] Remove NULL checks from delete

[Thomas Arnhold]

Hi,

I've recently seen some changes, which removed unnecessary NULL checks 
for delete commands with the form:

-    if (pTextPContext)
-        delete pTextPContext;
+    delete pTextPContext;

Codebase is full with these. I've attached a little perl script which 
should solve this conversion. I've attached a sample for the vcl dir.

Any objections?

Thomas
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