clang-tidy readability-delete-null-pointer

Change-Id: Ib47fc58f1cdfdd54adff07687c56198aa6f2091e
Reviewed-on: https://gerrit.libreoffice.org/62029
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

connectivity/source/drivers/odbc/OStatement.cxx

@@ -822,8 +822,7 @@ void OStatement_Base::setFetchSize(sal_Int32 _par0)
     {
         setStmtOption<SQLULEN, SQL_IS_UINTEGER>(SQL_ATTR_ROW_ARRAY_SIZE, _par0);
 
-        if (m_pRowStatusArray)
-            delete[] m_pRowStatusArray;
+        delete[] m_pRowStatusArray;
         m_pRowStatusArray = new SQLUSMALLINT[_par0];
         setStmtOption<SQLUSMALLINT*, SQL_IS_POINTER>(SQL_ATTR_ROW_STATUS_PTR, m_pRowStatusArray);
     }

extensions/source/scanner/sane.cxx

@@ -875,8 +875,7 @@ bool Sane::Start( BitmapTransporter& rBitmap )
         p_cancel( maHandle );
         CheckConsistency( "sane_cancel" );
     }
-    if( pBuffer )
-        delete [] pBuffer;
+    delete [] pBuffer;
 
     ReloadOptions();