Revert "Fix Coverity Warning - Uninitialized"

This reverts commit 61ad1d42c4.

I already fixed that warning in
670bcf71a3 (diff-b42d7aeb9fa3e3fa79ae8bafd6f5783d)

The newer commit didn't semantically change anything, it only made the
code two characters longer.

src/utils/irdya_datetime.cpp

@@ -21,7 +21,7 @@
 
 irdya_date irdya_date::read_date(const std::string& date)
 {
-	irdya_date date_result();
+	irdya_date date_result;
 
 	// Currently only supports a year and an epoch.
 	size_t year_start = date.find_first_not_of(' ');